HP OfficeJet 100 Mobile Printer Warning Lights [How to Fix]

In this article, we will discuss the meaning of HP OfficeJet 100 mobile printer warning lights and how to clear the warning lights.

HP OfficeJet 100 Portable Printer with Bluetooth & Mobile Printing (CN551A)

Table of Contents

Slow Blinking Power Light – HP OfficeJet 100 Mobile Printer Warning Lights

When you see your printer’s power light blinking slowly, it means that your printer is in sleep mode. You don’t have to do anything as this is a normal mode when the printer is inactive.

However, if you want to use the printer, press the power button to wake your printer.

We recommend that you read this article: HP Printer Sleep Mode [How To, Issues & Solutions] to learn more about HP printer sleep mode.

Blinking Power Light – HP OfficeJet 100 Mobile Printer Warning Lights

This is an indication that your printer is either turning off or on. It could also mean that your printer is waiting for the ink to get dry. You don’t have to do anything as this is a normal printer condition.

Turned-on Power Light and Blinking Resume Light – HP OfficeJet 100 Mobile Printer Warning Lights

When this happens, your printer will pause all operations. This can be caused by any of these:

i. No paper in the printer.

iii. Media width mismatch.

To fix this problem, do the following solutions:

1. Load Paper into your Printer – HP OfficeJet 100 Mobile Printer Warning Lights

To load paper into your printer, do the following steps:

Step 1: Lift your printer’s access cover.

Step 2: Press your printer’s button to turn it on if it is not turned on.

Step 3: Lift your printer’s paper tray.

Note: Don’t use wrinkled, torn, stapled, or clipped paper.

Step 4: Get a stack of plain paper and then tap it on an even surface to align the paper’s edges.

Step 5: Load the paper into the input tray with the print side facing up.

Step 6: Move the paper width guides on the tray to hold the paper stack in place.

Ensure that the guides don’t squeeze the paper stack.

Check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the solution below.

2. Change the Media Width Settings – HP OfficeJet 100 Mobile Printer Warning Lights

To change the media width settings so that it matches the print media in use, follow the steps below that apply to your computer’s operating system.

How to Change Media Width Settings on Windows

To change the media width settings on Windows, do the following steps:

Step 1: Open the document or photo you tried to print when the problem occurred. 

Step 2: Click on “File.”

Step 3: Click on “Print.”

This action will open the print dialog box.

Step 3: Choose your HP printer from the printer list.

Step 4: Click on “Properties.”

This action will open the properties dialog box.

Step 5: Click on the tab labeled “Features.”

Step 6: Click on the drop-down menu next to the “Paper Type” option.

Step 7: Click on “More.”

This action will open the dialog box.

Step 8: Choose the paper type option that matches the loaded paper in your printer.

Step 9: Click on “OK.”

Step 10: Click on the drop-down menu next to the “Size” option.

Step 11: Choose the paper size option that matches the loaded paper in your printer.

Step 12: Click on “OK.”

Step 13: Click on “OK” on the print dialog box.

The print job will start printing.

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How to Change Media Width Settings on Mac

To change the media width settings on Mac, do the following steps:

Step 1: Open the document or photo you tried to print when the problem occurred. 

Step 2: Click on “File.”

Step 3: Click on “Print.”

This action will open the print pop-up menu.

Step 4: Click on “Page Setup.”

This action will open the page setup pop-up menu.

Step 5: Go to the “Format For” pop-up menu and select your HP printer.

Step 6: From the “Paper Size” pop-up menu, choose the paper you want to print with.

Note: To create custom paper margins and dimensions, choose the “Manage Custom Sizes” option.

Step 7: From the “Page Setup” pop-up menu, click on “OK.”

Step 8: From the “Print” pop-up menu, click on “OK.”

If the above solutions do not fix the problem, then you need to service your HP printer.

You can either contact HP Customer Support to fix a repair date for the printer if your device is still under warranty: The repair is free for such printers. Furthermore, you will get a free replacement if the printer cannot be repaired.

You can still contact HP if your printer is no longer under warranty, but you will pay for the repair. However, contacting a local and reliable technician will be ideal.

Turned-on Power and Resume Lights – HP OfficeJet 100 Mobile Printer Warning Lights

This is an indication that your printer’s front access cover is open. To fix this issue, close your printer’s front access cover.

Blinking Power and Resume Lights – HP OfficeJet 100 Mobile Printer Warning Lights

This light pattern indicates any of the following:

i. Full ink service module.

ii. Paper jam.

iii. Carriage stall.

To fix this issue, do the following solutions in the given order.

1. Turn off and then Turn on your printer – HP OfficeJet 100 Mobile Printer Warning Lights

To turn off and then turn on your printer, do the following tasks:

1. Turn off and then Turn on your HP Printer

To turn off and then turn on your printer, do the following steps:

Step 1: Turn off your printer by pressing the power button.

If your printer fails to turn off, do the next solution to fix this issue.

Step 2: Wait for 60 seconds.

Step 3: Turn on your printer by pressing the power button.

Do the next task.

HP OfficeJet 100 Portable Printer with Bluetooth & Mobile Printing (CN551A)

2. Print a Self-Test Report on HP OfficeJet 100 Mobile printer

To print a self-test report on your printer, do the following steps:

Step 1: Load normal white paper into your printer’s input paper tray.

Step 2: Press down your printer’s “Cancel” button for three seconds.

This action will cause your printer to print a self-test report.

Check if the problem is fixed.

If the problem is fixed, and the self-test report prints, you can stop troubleshooting.

However, if the problem persists, do the solution below.

2. Check if the Ink Service Module is Full on HP OfficeJet 100 Mobile Printers – HP OfficeJet 100 Mobile Printer Warning Lights

To check if the ink service module is full, do the following tasks:

1. Check if the Ink Service Module is Full

To check if the ink service module is full, press down your printer’s “Cancel” button for 3 seconds.

  • If your printer’s resume and power lights continue blinking, move to the next solution.
  • If your printer’s resume and power lights stop blinking and the cartridge light starts blinking, then it means that the ink service module is full. In this case, do the next task to replace the module.

2. How to Replace Ink Service Module on HP OfficeJet 100 Mobile Printers

To replace the ink service module in your printer, do the following steps:

Step 1: Remove the power cable from your printer.

Step 2: If your printer uses a battery, remove it from your printer.

i. Slide the release slider to the left to free your battery.

ii. Pull out the battery from your printer.

Step 3: Carefully tilt your printer so that it rests on its side.

Step 4: Check the underside of the printer for the ink service module.

Note: Don’t turn your printer upside down when you are removing the ink service module. If you turn the printer during this removal process, it might lead to wet ink flowing out of your printer’s ink service module. We recommend that you use plastic gloves to prevent ink stains on furniture and your hands during the removal process.

Step 5: Press and move the notch that covers the module with the aid of a screwdriver.

Step 6: With the aid of a screwdriver, remove the module by rotating it to the left. 

Step 7: Take out the new ink service module from its packaging.

Step 8: Install the new module into your printer.

Step 9: Reinstall your printer battery if you removed it from your printer.

i. Slide your battery into the battery slot so that the contacts on the battery and the contacts within the printer are flushed together.

ii. Push your battery into the battery slot and ensure that it clicks properly into position.

Step 10: Plug the power cable into your printer.

Do the next task.

3. Reset HP OfficeJet 100 Mobile Printers

To reset your printer, do the following steps:

Caution: If you didn’t replace your printer’s ink service module, don’t reset your printer. Doing so might lead to an ink service module overflow.

Step 1: Turn on your printer if it is not turned on.

Step 2: Remove the power cable from your printer.

Step 3: Remove the power cable from the electrical wall outlet.

Step 4: Wait for a minimum of 15 seconds.

Step 5: Plug the power cable into the electrical wall outlet.

Step 6: Reconnect the power cable to your printer.

Step 7: Turn on your printer.

You can read this article: How to Reset HP Printer [Detailed Guide] to learn about other resets that you can perform on your HP printer.

Check if the problem is fixed.

If the problem is fixed, and the self-test report prints, you can stop troubleshooting.

However, if the problem persists, do the solution below.

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3. Clear Jammed Paper in HP OfficeJet 100 Mobile Printers – HP OfficeJet 100 Mobile Printer Warning Lights

To clear the jammed paper in your printer, do the following tasks in the given order.

Note: If any of the tasks resolves the problem, then you can stop troubleshooting without doing the next task.

1. Take out Loose Paper from HP OfficeJet 100 Mobile Printers

Check the input tray as well as the output slot for loose paper sheets. If you find any, take them out from the tray and the slot.

Note: Don’t insert your hands into the printer’s input tray when removing the loose sheets of paper. Instead, use tweezers to remove paper that you cannot easily reach. While using the tweezers, ensure that you exercise caution so that you don’t scratch the internal parts of your printer.

Check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the next task.

2. Remove Jammed Paper from the Output Slot of HP OfficeJet 100 Mobile Printers

To remove jammed paper from your printer’s output slot (front area), do the following steps:

Step 1: Turn off your printer by pressing the power button.

Step 2: Remove the printer’s power cable from the wall outlet or connected power source.

Step 3: Gently pull out the jammed paper and visible torn paper pieces from your printer’s output slot. When pulling out the jammed paper, ensure that you pull out the whole paper sheet with both hands. This will help to reduce the possibility of the paper getting torn in the process.

Note: Confirm that there are no torn paper pieces inside your printer’s output slot. Get a flashlight to examine the rollers as well as the wheels if these areas are not well-lit. Paper pieces within your printer can lead to further jams in the future.

Step 4: Reconnect the power cable to an electrical wall outlet.

Note: HP recommends that you plug your printer directly into a wall outlet rather than other power sources such as power strips and surge protectors.

Step 5: If your printer fails to turn on automatically, turn it on manually by pressing the power button.

Step 6: Load paper into your printer’s input tray.

Step 7: Press your printer’s “Resume” button.

If the steps above are successful, your printer will resume printing the print job that was interrupted when the paper jam occurred. However, the jammed pages will need to be resent.

If the steps above are unsuccessful, and your printer fails to resume printing, do the next task.

3. Remove Jammed Paper from the Front Access Cover of HP OfficeJet 100 Mobile Printers

To remove jammed paper from your printer’s front access cover, do the following steps:

Step 1: Check the printer’s input tray as well as the output slot for loose paper sheets. If you find any, remove them.

Step 2: Turn on your printer if it is not on, by pressing the power button.

Step 3: Open your printer’s front access cover.

Step 4: Allow the carriage to move to your printer’s center access area.

Step 5: Disconnect the power cable from the wall outlet or connected power source.

Warning: Ensure that you remove the power cable from your HP printer to prevent electric shock or injuries before moving the carriage with your hand to reset the printer’s paper feed mechanism.

Step 6: Move the carriage sideways if it is preventing access to the jammed paper.

Step 7: Gently pull out the jammed paper and visible torn paper pieces from your printer’s output slot. When pulling out the jammed paper, ensure that you pull out the whole paper sheet with both hands. This will help to reduce the possibility of the paper getting torn in the process.

Note: Confirm that there are no torn paper pieces inside your printer’s output slot. Get a flashlight to examine the rollers as well as the wheels if these areas are not well-lit. Paper pieces within your printer can lead to further jams in the future.

Step 8: Reconnect the power cable to an electrical wall outlet.

Note: HP recommends that you plug your printer directly into a wall outlet rather than other power sources such as power strips and surge protectors.

Step 9: If your printer fails to turn on automatically, turn it on manually by pressing the power button.

Step 10: Load paper into your printer’s input tray.

Step 11: Press your printer’s “Resume” button.

If the steps above are successful, your printer will resume printing the print job that was interrupted when the paper jam occurred. However, the jammed pages will need to be resent.

If the steps above are unsuccessful, and your printer fails to resume printing, do the next task.

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4. Print a Self-Test Report

To print a self-test report on your printer, follow the instructions we shared under the Print a Self-Test Report on HP OfficeJet 100 Mobile printersection of this article.

Check if the problem is fixed.

If the problem is fixed, and the self-test report prints, you can stop troubleshooting.

However, if the problem persists, do the solution below.

4. Ensure that the Carriage is Moving Freely in HP OfficeJet 100 Mobile Printer Series – HP OfficeJet 100 Mobile Printer Warning Lights

To ensure that the carriage is moving freely, do the following tasks:

1. Check for Obstructions in the Carriage Path

To check for obstructions in the carriage path, do the following steps:

Step 1: Turn on your printer by pressing its power button.

Step 2: Open your printer’s front access cover.

Step 3: Allow the carriage to move to your printer’s center access area.

Step 4: Remove the power cable from its connected power source or wall outlet.

Warning: Ensure that you remove the power cable from your HP printer to prevent electric shock or injuries before moving the carriage with your hand to reset the printer’s paper feed mechanism.

Step 5: Ensure that the ink cartridges are properly secured in the carriage.

Step 6: Confirm that your printer’s cartridge latch is closed. You can press down the latch to ensure that it is locked in place.

Step 7: Check for and remove foreign objects or paper that might be preventing the carriage from moving freely.

Note: Get a flashlight to check for foreign objects or torn paper pieces around your printer’s carriage. If you find any objects or paper pieces, remove them as they can lead to further jams in the future.

Step 8: Place your hand into the printer, and slide the carriage within the printer.

  • If the carriage is on the right, slide it to the left.
  • If the carriage is on the left, slide it to the right.
  • If the carriage is in the middle, slide it to the right.

Step 9: Remove obstructions or loose paper you might find around your printer’s carriage.

Step 10: Gently slide the carriage from one end of the carriage path to the other and back to confirm and ensure that it is moving freely.

Step 11: Plug the printer’s power cable into an electrical wall outlet.

Step 12: If your printer fails to turn on automatically, manually turn it on by pressing the power button.

Step 13: Load paper into your printer’s input tray.

Step 14: Press your printer’s “Resume” button.

If the steps above are successful, your printer will resume printing the print job that was interrupted when the paper jam occurred. However, the jammed pages will need to be resent.

If the steps above are unsuccessful, and your printer fails to resume printing, do the next task.

2. Print a Self-Test Report

To print a self-test report on your printer, follow the instructions we shared under the Print a Self-Test Report on HP OfficeJet 100 Mobile printersection of this article.

Check if the problem is fixed.

If the problem is fixed, and the self-test report prints, you can stop troubleshooting.

However, if the problem persists, do the solution below.

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5. Clean Paper Rollers of HP OfficeJet 100 Mobile Printer Series – HP OfficeJet 100 Mobile Printer Warning Lights

To clean your printer’s paper rollers, do the following tasks:

1. Clean your Printer’s Paper Rollers

To clean your printer’s paper rollers, do the following steps:

Step 1: Get these items:

  • A clean, fluff-free fabric.
  • Distilled, bottled, or filtered water. Do not use tap water as the contaminants in it might damage your printer.

Step 2: Turn off your printer by pressing its power button.

Step 3: Remove the power cable from the wall outlet or connected power source.

Step 4: Open your printer’s front output door.

Step 5: Check inside the printer for the paper rollers.

Step 6: Get a fluff-free fabric and dampen it with bottled or distilled water.

Squeeze out excess moisture from the fabric.

Step 7: Clean the paper rollers by pressing the fabric against the paper rollers while carefully rotating the rollers upward with your fingers to get them thoroughly cleaned. Apply some pressure so that dirt or dust buildup will be removed easily.

Step 8: Wait for a minimum of 10 minutes or a maximum of 15 for the rollers to get dry.

Step 9: Plug the power cable into the wall outlet.

Note: HP recommends that you plug your printer directly into a wall outlet rather than other power sources such as power strips and surge protectors.

Step 10: Turn on your printer by pressing its power button if it fails to turn on automatically.

Do the next task.

2. Print a Self-Test Report

To print a self-test report on your printer, follow the instructions we shared under the Print a Self-Test Report on HP OfficeJet 100 Mobile printersection of this article.

Check if the problem is fixed.

If the problem is fixed, and the self-test report prints, you can stop troubleshooting.

However, if the problem persists, do the solution below.

6. Reset your printer – HP OfficeJet 100 Mobile Printer Warning Lights

To reset your printer, do the following tasks:

1. Reset your HP Printer

To reset your HP printer, follow the steps we shared under the Reset HP OfficeJet 100 Mobile Printerssection of this article.

After resetting your printer, do the next task.

2. Print a Self-Test Report

To print a self-test report on your printer, follow the instructions we shared under the Print a Self-Test Report on HP OfficeJet 100 Mobile printersection of this article.

Check if the problem is fixed.

If the problem is fixed, and the self-test report prints, you can stop troubleshooting.

However, if the problem persists, then you need to service your HP printer.

We recommend that you read this article: HP Printer Warning [Detailed Guide] to learn about other HP printer warnings that you might encounter when using your HP printer.

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Turned-on Power Light and Turned-on or Blinking Resume Light – HP OfficeJet 100 Mobile Printer Warning Lights

This is an indication that the connected USB hub is not supported by your printer. To fix this issue, remove the USB hub from your printer, and then try to print again.

Turned-on Power and Bluetooth Lights – HP OfficeJet 100 Mobile Printer Warning Lights

This means that your Bluetooth is on. This is a normal printer condition that requires no action.

Green Battery Status Light – HP OfficeJet 100 Mobile Printer Warning Lights

When the battery status light of your printer is green, it means that the battery is around 41% to 100% charged. In this case, you don’t have to take any action.

Amber Battery Status Light – HP OfficeJet 100 Mobile Printer Warning Lights

When the battery status light of your printer is amber, it means that the battery is around 10% to 41% charged. In this case, you need to recharge your battery by plugging your printer’s power cable into an electric wall outlet.

Red Battery Status Light – HP OfficeJet 100 Mobile Printer Warning Lights

When the battery status light of your printer is red, it means that the battery is around below 10%charged. In this case, you need to recharge your battery by plugging your printer’s power cable into an electric wall outlet.

Blinking Red Battery Status Light – HP OfficeJet 100 Mobile Printer Warning Lights

When the battery status light of your printer is blinking red, it means that the battery is below 2% charged, and needs to be charged at once. Recharge your battery by plugging your printer’s power cable into an electric wall outlet.

Turned-on Battery Status and Battery Charging Lights – HP OfficeJet 100 Mobile Printer Warning Lights

When the battery status light and the battery charging light are on, it is an indication that your printer’s battery is charging. Since this is a normal condition, you don’t have to do anything.

Note: The battery status light’s color shows the charge level of the battery. When fully charged, the battery charging light will turn off.

Red Battery Charging Light – HP OfficeJet 100 Mobile Printer Warning Lights

If your printer’s battery charging light shines red, then it means that the battery is damaged and needs to be replaced. When the battery is replaced, the battery charging light will return to its normal color.

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Blinking Power and Resume Lights, and Blinking or Turned-on Right and Left Cartridge Lights – HP OfficeJet 100 Mobile Printer Warning Lights

If the power and resume lights are blinking, and you press down the printer’s “Cancel” button for three seconds, the right and left cartridge lights will either turn on or start blinking.

This condition indicates that your printer’s carriage is stuck and might be due to any of these:

i. Unsecured cartridge latches.

ii. Paper jam.

To fix this problem, do the following solutions in the given order.

1. Close the latches of the Cartridge – HP OfficeJet 100 Mobile Printer Warning Lights

To close the latches of the cartridge, do the following steps:

Step 1: Turn on your printer by pressing the power button.

Step 2: Open your printer’s front access cover.

Step 3: Wait for the carriage to become silent and idle before you proceed.

Step 4: Ensure that the latches of the cartridge are properly closed and resting evenly on the installed ink cartridges.

Step 5: Close your printer’s front access cover.

Step 6: Wait for your printer to become silent and idle before you proceed.

Step 7: Try to print again.

If the problem is resolved after doing the above steps, stop troubleshooting.

If the problem persists, do the solution below.

2. Clear Paper Jam – HP OfficeJet 100 Mobile Printer Warning Lights

To clear paper jams within your printer, do the following tasks:

1. Take out Loose Paper from your Printer

To take out the loose paper from your printer, follow the instructions we shared under the Take out Loose Paper from HP OfficeJet 100 Mobile Printerssection of this article.

After removing loose paper from your printer, check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the next task.

2. Remove Jammed Paper from your Printer’s Output Slot

To remove jammed paper from your printer’s output slot, follow the instructions we shared under the Remove Jammed Paper from the Output Slot of HP OfficeJet 100 Mobile Printerssection of this article.

After removing jammed paper from your printer’s output slot, check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the next task.

3. Remove Jammed Paper from your Printer’s Front Access Cover

To remove jammed paper from your printer’s front access cover, follow the instructions we shared under the Remove Jammed Paper from the Front Access Cover of HP OfficeJet 100 Mobile Printerssection of this article.

After removing jammed paper from your printer’s front access cover, check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the next task.

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4. Ensure that the Carriage is Moving Freely

To ensure that the carriage is moving freely, follow the steps we shared under the Ensure that the Carriage is Moving Freely in HP OfficeJet 100 Mobile Printer Seriessection of this article.

After ensuring that the carriage is moving freely, check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the next task.

5. Print a Self-Test Report

To print a self-test report on your printer, follow the instructions we shared under the Print a Self-Test Report on HP OfficeJet 100 Mobile printersection of this article.

After printing the self-test report, check if the problem is fixed.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, then you need to service your HP printer.

Blinking Power and Resume Lights, and Turned-on Left Cartridge Light, and Blinking Right Cartridge Light – HP OfficeJet 100 Mobile Printer Warning Lights

If the power and resume lights are blinking, and you press down the printer’s “Cancel” button for three seconds, the left cartridge light will turn on while the right cartridge light will start blinking. in addition, this message might be displayed on your computer: “Replace Ink Service Module As Soon As Possible.”

The light pattern and the message displayed on the computer are an indication of an almost full ink service module.

To fix this problem, do the following solutions in the given order:

1. Change the Ink Service Module – HP OfficeJet 100 Mobile Printer Warning Lights

To change the ink service module in your printer, do the following tasks.

1. Change the Ink Service Module

To change the ink service module, follow the steps we shared under the How to Replace Ink Service Module on HP OfficeJet 100 Mobile Printerssection of this article.

After changing the ink service module, do the next task below

2. Reset your HP Printer

Caution: If you didn’t replace your printer’s ink service module, don’t reset your printer. Doing so might lead to an ink service module overflow.

To reset your HP printer, do the steps under the Reset HP OfficeJet 100 Mobile Printerssection of this article.

After resetting your printer, check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the solution below.

2. Print in Reserve Mode – HP OfficeJet 100 Mobile Printer Warning Lights

HP OfficeJet 100 mobile printers have a special mode that allows you to print with the tri-color cartridge only when the black cartridge is taken out of the printer. This mode is known as reserve mode.

If you are unable to replace the ink service module, then you can use this option as a temporary solution. However, bear in mind that you cannot use this mode for an extended period.

Note: When printing in reserve mode, the print speed, and the color results might be affected.

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How to Print in Reserve Mode on HP OfficeJet 100 Mobile Printers

To print in reserve mode on HP OfficeJet 100 mobile printers, do the following steps:

Step 1: Open your printer’s cover.

Step 2: Allow the carriage within your printer to become idle and silent before you proceed.

Step 3: Lift the latch of the right cartridge to free the black ink cartridge from its slot.

Step 4: Gently remove the black ink cartridge from its slot by pulling it up and then out from your printer. 

Sep 5: Close the latch of the right cartridge.

Step 6: Close your printer’s front access cover.

Step 7: Wait for your printer to become silent and idle before you proceed.

Step 8: Try to print a document or photo again.

Your printer should resume printing in reserve mode.

If your printer fails to print in this mode, then you need to service your HP printer.

Blinking Power, Resume, Left and Right Cartridge Lights – HP OfficeJet 100 Mobile Printer Warning Lights

If the power and resume lights are blinking, and you press down the printer’s “Cancel” button for three seconds, the left and right cartridge lights will start blinking. in addition, this message might be displayed on your computer: “Replace Ink Service Module Immediately.”

The light pattern and the message displayed on the computer are an indication of a full ink service module.

To fix this problem, do the following solutions in the given order:

1. Change the Ink Service Module – HP OfficeJet 100 Mobile Printer Warning Lights

To change the ink service module in your printer, do the following tasks.

1. Change the Ink Service Module

To change the ink service module, follow the steps we shared under the How to Replace Ink Service Module on HP OfficeJet 100 Mobile Printerssection of this article.

After changing the ink service module, do the next task below

2. Reset your HP Printer

Caution: If you didn’t replace your printer’s ink service module, don’t reset your printer. Doing so might lead to an ink service module overflow.

To reset your HP printer, do the steps under the Reset HP OfficeJet 100 Mobile Printerssection of this article.

After resetting your printer, check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the solution below.

2. Print in Reserve Mode – HP OfficeJet 100 Mobile Printer Warning Lights

To print in reserve mode, follow the steps we shared under the How to Print in Reserve Mode on HP OfficeJet 100 Mobile Printerssection of this article.

If your printer fails to print in reserve mode, then you need to service your HP printer.

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Turned-on Power Light, and Blinking Right or Left Cartridge Light – HP OfficeJet 100 Mobile Printer Warning Lights

When your printer’s power light is on and the right or left cartridge light is blinking, it means your printer has encountered a borderless printing error.

It can also mean that the photo or black cartridge or tri-color cartridge has an issue.

Note: If it is the right cartridge light that is blinking, then the issue is with the photo or black cartridge. If it is the left cartridge that is blinking, then the issue is with the tri-color cartridge. You also need to check the message displayed on your computer to discover further instructions that will guide you on how to resolve the problem. 

To fix this issue, do the following solutions.

1. Confirm that the Borderless Print Settings are Correct – HP OfficeJet 100 Mobile Printer Warning Lights

This solution applies most to borderless document printing. In other words, if the document you tried to print doesn’t have borders, you need to confirm that the borderless print settings you have chosen are correct.  

Follow the steps below to learn how to confirm that the borderless print settings are correct depending on your computer’s operating system.

How to Confirm that the Borderless Print Settings are Correct on Windows when Printing on HP OfficeJet 100 Mobile Printers

To confirm that the borderless print settings are correct on Windows, do the following steps:

Step 1: Lift your printer’s input tray.

Step 2: Adjust the tray’s paper width guide to the extreme position.

Step 3: Insert paper into your printer’s input tray.

Step 4: Adjust the tray’s paper width guide to rest against the edge of the loaded paper.

Ensure that the guide does not squeeze the paper.

Step 5: Open the software you intend to print from on your Windows computer.

Step 6: Click on “File.”

Step 7: Click on “Print.”

Step 8: Click on “Preferences” or “Properties” depending on the available option provided by the software program in use.

Step 9: Click on the tab labeled “Features.”

Step 10: Click on the “Size” drop-down menu.

Step 11: Click on “More.”

Step 12: Choose the size of paper that matches the size of the loaded paper in your printer’s input tray.

Step 13: Click on the check box next to the “Borderless” option to select this option if it isn’t selected already.

Note: In case the selected paper type and paper size settings aren’t borderless printing compatible, a message will be displayed informing you to change the current paper settings.

Step 14: Click on “OK.”

Step 15: From the print window, click on “OK.”

This action will print the borderless document on your printer.

How to Confirm that the Borderless Print Settings are Correct on Mac when Printing on HP OfficeJet 100 Mobile Printers

To confirm that the borderless print settings are correct on Mac, do the following steps:

Step 1: Lift your printer’s input tray.

Step 2: Adjust the tray’s paper width guide to the extreme position.

Step 3: Insert paper into your printer’s input tray.

Step 4: Adjust the tray’s paper width guide to rest against the edge of the loaded paper.

Ensure that the guide does not squeeze the paper.

Step 5: Open the software you intend to print from on your Mac.

Step 6: Click on “File.”

Step 7: Click on “Print.”

Step 8: Choose your printer’s name from the “Printer” pop-up menu.

Step 9: Click on the down arrow beside the “Printer” pop-up menu.

This action will open your Mac’s print job settings.

Step 10: Click on “Paper/Type Quality” from the pop-up menu underneath the orientation options.

Step 11: Choose the paper type that matches the type of the loaded paper in your printer’s input tray from the “Paper Type” pop-up menu.

Step 12: Choose the “Maximum dpi” or “Best” option from the “Quality” pop-up menu.

Step 13: Choose the “Borderless 10x15cm” or “Borderless A4” option from the “Paper Size” pop-up menu.

Step 14: Click on Print.

This action will print the borderless document on your printer.

Check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the solution below. 

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2. Check if the Cartridges are Inserted – HP OfficeJet 100 Mobile Printer Warning Lights

If one or both of the cartridges are not inserted, your printer will encounter this issue. Therefore, you need to confirm that the cartridges are inserted, and if they are not, then you need to insert them.

Do the following tasks to check if the cartridges are inserted.

1. Check if the Cartridges are Missing

To check if the cartridges are missing, do the following steps:

Step 1: Open your printer’s top access cover.

Step 2: Check the cartridges if one or both of them are missing.

If both ink cartridges are in your printer’s carriage, jump to the next solution.

If one or both of the ink cartridges are missing, do the next task.

2. Insert the Missing Cartridges

To insert the missing cartridges, do the steps below:

Step 1: Grasp the ink cartridge by the sides while ensuring that the contacts on the cartridge are facing the carriage in your printer.

Step 2: Install the ink cartridge into the appropriate carriage slot at a slightly tilted angle.     

Step 3: Push the cartridge gently into the slot and ensure that is seated correctly.

Note: The left slot is for the tri-color cartridge, while the right slot is for the photo or black cartridge.

Step 4: If both cartridges are missing, repeat the above steps for the other cartridge.

Step 5: Close the latch of the cartridge.

Step 6: Press down the latch to ensure that it is resting evenly on the ink cartridges.

Step 7: Close your printer’s front access cover.

Step 8: Allow your printer to complete the cartridge initialization before you continue.

Do the next task.

3. Align the Installed Cartridges on HP OfficeJet 100 Mobile Printers

To align your installed cartridges, choose the method below depending on your computer’s operating system.

Via Windows

To align the installed cartridges via Windows, do the following steps:

Step 1: Click on the search icon on the taskbar.

Step 2: Type “HP.”

Step 3: Click on the name of your HP printer from the search results.

This action will open the HP Printer Assistant.

Step 4: Click on “Maintain Your Printer.”

Step 5: Click on the tab labeled “Device Services.”

Step 6: Click on “Align Cartridges.”

An alignment page will be printed and an alignment window will open.

Step 7: Follow the instructions on the screen to complete the printhead alignment.

Step 8: Click on “Done.”

Step 9: Discard or recycle the printed alignment page.

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Via Mac

Step 1: Search for “Print.”

Step 2: From the search results, click on “Printers & Scanners.”

Step 3: Click on the name of your HP printer.

Step 4: Click on “Open Print Queue.”

Step 5: Click on “Settings” or “Printer Setup.”

Step 6: Click on “Utility.”

Step 7: Click on “Open Printer Utility.”

Step 8: Click on “Align.”

An alignment page will be printed and an alignment window will open.

Step 9: Follow the instructions on the screen to complete the printhead alignment.

Sep 10: Click on “Done.”

Step 11: Discard or recycle the printed alignment page.

Check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the solution below. 

3. Remove and then Reinsert the Ink Cartridges – HP OfficeJet 100 Mobile Printer Warning Lights

If the cartridges are not correctly installed or placed properly, it might lead to this problem. Therefore, you need to confirm that the cartridges are installed correctly and properly placed by removing and then reinserting the ink cartridge.

To remove and then reinsert the ink cartridges, do the following tasks.

1. How to Remove the Ink Cartridges from HP OfficeJet 100 Mobile Printers

To remove the ink cartridges, do the following steps:

Step 1: Turn on your printer by pressing the power button.

Step 2: Open your printer’s front access cover.

Step 3: Wait for the carriage to become silent and idle before you continue.

Caution: Do not try to install the ink cartridges while the carriage is moving to prevent injuries.

Step 4: Lift the latch of the cartridge.

Step 5: Take out the cartridge from the printer’s carriage.

Note: When removing the cartridge, ensure that you don’t touch the cartridge’s contacts or ink nozzles to prevent damage to the ink cartridge.

Step 6: Repeat 4 and 5 to take out the other ink cartridge from your printer.

Do the next task.

2. Reinsert the Ink Cartridges

To reinsert the ink cartridges, follow the steps we shared under the Insert the Missing Cartridgessection of this article.

Check if the problem is resolved.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, then you need to service your HP printer.

HP 95 | 2 Ink Cartridges | Black, Tri-color | C9364WN, C9368WN

Turned-on Power Light, Blinking Resume, and Right or Left Cartridge Lights – HP OfficeJet 100 Mobile Printer Warning Lights

This means that the ink in the indicated cartridge is very low. It can also mean that the cartridge has been previously used or is a counterfeit.

To resolve this problem, do the following solutions in the given order.

Note: The left cartridge light is for the tri-color cartridge, while the right cartridge light is for the photo or black cartridge.

1. Use Only Genuine HP Ink Cartridge – HP OfficeJet 100 Mobile Printer Warning Lights

If you are using non-genuine HP ink cartridges, you are bound to encounter an issue with your printer. Therefore, you need to confirm that the cartridges in use are genuine HP supplies. The rest of the solutions might not work if you are not using genuine HP ink cartridges.

Once you are certain that you are using genuine HP ink cartridges, check if the issue is resolved.

If the issue is resolved, then you can stop troubleshooting since the counterfeit cartridge was the cause of the issue.

However, if the issue persists, do the solution below.

2. Change the Low Ink Cartridge – HP OfficeJet 100 Mobile Printer Warning Lights

To change the low ink cartridge, do the following tasks.

1. How to Replace the Low Ink Cartridge in HP OfficeJet 100 Mobile Printers

To replace the low ink cartridge, do the following steps:

Step 1: Turn on your printer by pressing the power button.

Step 2: Open your printer’s front access cover.

Step 3: Wait for the carriage to become silent and idle before you continue.

Step 4: Lift the latch of the cartridge.

Step 5: Take out the cartridge from the printer’s carriage.

Step 6: Take out the new ink cartridge from the packaging.

Step 7: Remove the cartridge’s protective tape by pulling the pink tab.

Caution: When removing the cartridge, ensure that you don’t touch the cartridge’s contacts or ink nozzles to prevent damage to the ink cartridge.

Step 8: Install the ink cartridge into the appropriate carriage slot at a slightly tilted angle.    

Step 9: Push the cartridge gently into the slot and ensure that is seated correctly.

Note: The left slot is for the tri-color cartridge, while the right slot is for the photo or black cartridge.

Step 10: Close the latch of the cartridge.

Step 11: Press down the latch to ensure that it is resting evenly on the ink cartridges.

Step 12: Close your printer’s front access cover.

Step 13: Allow your printer to complete the cartridge initialization before you continue.

Do the next task.

2. Align the Installed Cartridges

To align your installed cartridges, follow the instructions we shared under the Align the Installed Cartridges on HP OfficeJet 100 Mobile Printerssubsection of this article.

After aligning the installed cartridges, check if the issue is resolved.

If the issue is resolved, stop troubleshooting.

If the issue persists, then you need to service your HP printer.

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Turned-on Power and Right or Left Cartridge Lights – HP OfficeJet 100 Mobile Printer Warning Lights

This means that the ink in the indicated cartridge is low. To resolve this issue, you need to replace the affected ink cartridge. Do the following tasks to replace the affected ink cartridge.

Note: You can still print when you see this light pattern without replacing the cartridge. However, you need to change the ink cartridge when the print quality becomes nonacceptable.

1. Replace the Low Ink Cartridge – HP OfficeJet 100 Mobile Printer Warning Lights

To replace the low ink cartridge, follow the steps we shared under the How to Replace the Low Ink Cartridge in HP OfficeJet 100 Mobile Printerssection of this article.

After replacing the low ink cartridge, do the task below.

2. Align the Installed Cartridges – HP OfficeJet 100 Mobile Printer Warning Lights

To align your installed cartridges, follow the instructions we shared under the Align the Installed Cartridges on HP OfficeJet 100 Mobile Printerssection of this article.

After aligning the installed cartridges, check if the issue is resolved.

If the issue is resolved, stop troubleshooting.

If the issue persists, then you need to service your HP printer.

Blinking Power and Right or Left Cartridge Lights – HP OfficeJet 100 Mobile Printer Warning Lights

This is an indication that the tri-color or the photo or black cartridge has an issue. To fix this issue, do the following solutions.

1. Remove and then Reinsert the Ink Cartridge – HP OfficeJet 100 Mobile Printer Warning Lights

To remove and then reinsert the affected ink cartridge, do the following tasks:

1. Remove the Affected Ink Cartridge

To remove the affected ink cartridge, check the How to Remove the Ink Cartridges from HP OfficeJet 100 Mobile Printerssubsection of this article and follow steps 1 – 5.

After removing the affected ink cartridge, do the next task. 

2. Reinsert the Affected Ink Cartridge into your Printer

To reinsert the affected ink cartridge into your printer, do the following steps:

To insert the missing cartridges, do the steps below:

Step 1: Grasp the affected ink cartridge by the sides while ensuring that the contacts on the cartridge are facing the carriage in your printer.

Step 2: Install the ink cartridge into the appropriate carriage slot at a slightly tilted angle.    

Step 3: Push the cartridge gently into the slot and ensure that is seated correctly.

Note: The left slot is for the tri-color cartridge, while the right slot is for the photo or black cartridge.

Step 4: Close the latch of the cartridge.

Step 5: Press down the latch to ensure that it is resting evenly on the ink cartridges.

Step 6: Close your printer’s front access cover.

Step 7: Allow your printer to complete the cartridge initialization before you continue.

Do the next task.

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3. Try Printing

Try to print a document, and confirm that you are satisfied with the print quality.

If the problem is resolved, stop troubleshooting.

However, if the problem persists, do the solution below.

2. Replace the Affected Ink Cartridge – HP OfficeJet 100 Mobile Printer Warning Lights

To replace the affected ink cartridge, do the following tasks:

1. Replace the Affected Ink Cartridge

To replace the affected ink cartridge, follow the steps we shared under the How to Replace the Low Ink Cartridge in HP OfficeJet 100 Mobile Printerssection of this article.

After replacing the low ink cartridge, do the task below.

2. Align the Installed Cartridges

To align your installed cartridges, follow the instructions we shared under the Align the Installed Cartridges on HP OfficeJet 100 Mobile Printerssubsection of this article.

After aligning the installed cartridges, check if the issue is resolved.

If the issue is resolved, stop troubleshooting.

If the issue persists, then you need to service your HP printer.