In this article, we will discuss the meaning of HP printer warning lights on HP Ink Tank 110 printers and how to clear the warning lights.
Note: The guide below is for HP Ink Tank 119, 118, 116, and 115 printers.
Table of Contents
Warning, Error, Resume Lights and One or Both Printhead Lights are Blinking – HP Printer Warning Lights on HP Ink Tank 110 Printers
This happens when one or both of the printheads is incompatible, damaged, missing, incorrect, or faulty and require attention.
To resolve this problem, do the following tasks:
1. Confirm that the Printhead is Installed in HP Ink Tank 110 Printers – HP Printer Warning Lights on HP Ink Tank 110 Printers
To confirm that the printhead is installed in HP Ink Tank 110 printers, follow the steps below:
Step 1: Turn on your HP printer.
Step 2: Ensure that the paper is in the printer’s input tray.
Step 3: Check the tank and confirm that the ink level is not below the minimum fill line.
Step 4: Close your printer’s output tray extender.
Step 5: Rotate the printer’s output tray to the left to store it in your printer.
Step 6: Open your printer’s exterior door.
Step 7: Open your printer’s printhead access door.
Step 8: Press down the printer’s “Resume” button for about 3 seconds.
This action will move the carriage to the middle of your printer.
Step 9: Allow the carriage to become silent and stop moving before you proceed.
Step 10: Push down the carriage latch.
This action will open the carriage latch.
Step 11: Check if the printhead is installed.
If it is installed, do the next task.
If it is not installed, then you need to install the printhead.
2. Remove and Examine the Printhead – HP Printer Warning Lights on HP Ink Tank 110 Printers
To remove and examine the printhead, follow the steps below:
Step 1: Press down the printhead gently to free it from your printer.
Step 2: Pull out the printer from its slot.
Caution: To ensure that the ink in the printhead doesn’t leak or spill, hold the sides of the printhead and keep it upright always. To prevent transferring ink to your surfaces, place a sheet of paper on the surface before placing the printhead on the surface.
Step 3: Examine the printhead for damages.
If the printhead is damaged, then you need to replace the printhead.
If there are no visible damages, do the next step.
Step 4: Confirm that the printhead is compatible with your printer by checking the printhead model number. Verify that it is the same as that recommended to be used in your printer.
If the printhead is not compatible, then you need to replace the printhead with a compatible printhead.
If the printhead is compatible, do the next task.
3. Reinstall the Printhead in HP Ink Tank 110 Printers – HP Printer Warning Lights on HP Ink Tank 110 Printers
To reinstall the printhead in HP Ink Tank 110 printers, follow the steps below:
Step 1: Move the printhead into the printhead slot at a somewhat upward angle.
Step 2: Push the printhead until you hear it snap in its slot.
Step 3: Firmly push down your printer’s carriage latch to close it.
Ensure that the latch snaps into place.
Step 4: Close your printer’s printhead access door.
Step 5: Close your printer’s exterior door.
Step 6: Pull out your printer’s output tray.
Step 7: Lift the output tray extender.
Check if the issue is resolved.
If the issue persists, then you need to replace the printhead.
4. Replace the Printhead in HP Ink Tank 110 Printers – HP Printer Warning Lights on HP Ink Tank 110 Printers
To replace the printhead, follow the steps below:
Step 1: Turn on your HP printer.
Step 2: Ensure that the paper is in the printer’s input tray.
Step 3: Check the tank and confirm that the ink level is not below the minimum fill line.
Step 4: Close your printer’s output tray extender.
Step 5: Rotate the printer’s output tray to the left to store it in your printer.
Step 6: Open your printer’s exterior door.
Step 7: Open your printer’s printhead access door.
Step 8: Press down the printer’s “Resume” button for about 3 seconds.
This action will move the carriage to the middle of your printer.
Step 9: Allow the carriage to become silent and stop moving before you proceed.
Step 10: Push down the carriage latch.
This action will open the carriage latch.
Step 11: Press down the printhead gently to free it from your printer.
Step 12: Pull out the printer from its slot.
Caution: To ensure that the ink in the printhead doesn’t leak or spill, hold the sides of the printhead and keep it upright always. To prevent transferring ink to your surfaces, place a sheet of paper on the surface before placing the printhead on the surface.
Step 13: Take out the new printhead from the package.
Step 14: Remove the plug on the printhead by pulling it straight up.
Step 15: Take away the protective tape from the contacts on the printhead.
Caution: Don’t touch the ink nozzle or copper-colored contact. Don’t place the tape back on the printhead contacts after it is removed. Doing any of these could lead to poor electrical connections, ink failure, and clogs.
Step 16: Move the printhead into the printhead slot at a somewhat upward angle.
Step 17: Push the printhead until you hear it snap in its slot.
Ensure that you put the tri-color printhead in the left slot and the black printhead in the right slot.
Step 18: Firmly push down your printer’s carriage latch to close it.
Ensure that the latch snaps into place.
Step 19: Close your printer’s printhead access door.
Step 20: Close your printer’s exterior door.
Step 21: Pull out your printer’s output tray.
Step 22: Lift the output tray extender.
After replacing the printhead, do the next task.
5. Prime your Printer’s Ink System & Align the Installed Printhead – HP Printer Warning Lights on HP Ink Tank 110 Printers
To prime your printer’s ink system and then align the installed printhead, do the following steps:
Step 1: Press down your printer’s “Resume” button for about 3 seconds.
Step 2: Align the installed printhead by printing an alignment page.
Choose the method below depending on your computer’s operating system.
Via Windows
i. Click on the search icon on the taskbar.
ii. Type “HP.”
iii. Click on the name of your HP printer from the search results.
This action will open the HP Printer Assistant.
iv. Click on “Maintain Your Printer.”
v. Click on the tab labeled “Device Services.”
vi. Click on “Align Cartridges.”
An alignment page will be printed and an alignment window will open.
vii. Follow the instructions on the screen to complete the printhead alignment.
viii. Click on “Done.”
ix. Discard or recycle the printed alignment page.
Via Mac
i. Search for “Print.”
ii. From the search results, click on “Printers & Scanners.”
iii. Click on the name of your HP printer.
iv. Click on “Open Print Queue.”
v. Click on “Settings” or “Printer Setup.”
vi. Click on “Utility.”
vii. Click on “Open Printer Utility.”
viii. Click on “Align.”
An alignment page will be printed and an alignment window will open.
ix. Follow the instructions on the screen to complete the printhead alignment.
x. Click on “Done.”
xi. Discard or recycle the printed alignment page.
Blinking Warning, Error, Resume Lights – HP Printer Warning Lights on HP Ink Tank 110 Printers
This occurs when you select a paper length that doesn’t match the loaded paper’s length.
To resolve this problem, follow the steps below:
Step 1: Cancel the current print job by pressing the printer’s “Cancel” button.
Step 2: Load the right paper size in your printer’s input tray.
Alternatively, you can adjust the print settings to match the loaded paper’s size.
If your HP printer is connected to a Windows computer, read this article: HP Printer Error Paper Mismatch [How to Fix]to fix this paper mismatch error.
For Mac Users, follow the instructions in the subsection below.
How to Fix HP Printer Paper Mismatch Error on Mac – HP Printer Warning Lights on HP Ink Tank 110 Printers
To fix the HP printer paper mismatch error on Mac, do the following solutions:
1. Change Paper Size Setting – HP Printer Warning Lights on HP Ink Tank 110 Printers
To change the paper size setting to make it match the size of the loaded paper, follow the steps below:
Note: Some HP printers are designed with an option that allows you to overlook the error and resume printing. If you select that option, your printout margins are likely to be unproportioned to the paper’s edges.
Step 1: Click on “File” after opening the program you are printing from.
Step 2: Click on “Print.”
Step 3: If you see this button displayed: “Show Details,” click on it to display all the available options.
When you click the button, it becomes “Hide Details.”
Step 4: Choose your HP printer from the drop-down list for “Printer.”
Step 5: Click on “Paper Size.”
Step 6: Choose the paper size that matches the loaded paper size. You should also choose the paper type.
If you can’t find the exact size, select one that is almost the same size as the loaded paper.
Step 7: Click on “OK.”
Note: Some programs might not show the “Paper Size” setting when the options under “Print” are displayed. In such a case, click on “File,” before clicking on “Page Setup.”
After doing the above steps, check if the issue is resolved.
If the issue remains unresolved, do the next solution.
2. Reset HP Ink Tank 110 Printers – HP Printer Warning Lights on HP Ink Tank 110 Printers
To reset an HP Ink Tank 110 printer, follow the steps below:
Step 1: Turn on your HP printer (if it is turned off).
Step 2: Remove the power cable from your printer.
Step 3: Disconnect the power cable from its connected power source.
Step 4: Wait for 60 seconds.
Step 5: Plug the power cable into an electrical outlet as recommended by HP instead of any other power source.
Step 6: Connect the power cable to your printer.
You can read this article: How to Reset HP Printer [Detailed Guide] to learn other types of resets that you can perform on your HP printer.
Check if the issue is resolved.
If the issue remains unresolved, try the next solution.
3. Remove and then Re-add your HP Printer – HP Printer Warning Lights on HP Ink Tank 110 Printers
To remove and then re-add your HP printer, do the following steps:
Step 1: Click on the “Apple” icon/menu.
Step 2: Click on “System Preferences.”
Step 3: Click on “Printers & Scanners,” “Print & Scan,” or “Print & Fax” deepening on the version of your operating system.
Step 4: Click on your HP printer name.
Step 5: Click on the “Minus” sign.
Step 6: Delete your HP printer.
Step 7: Click on the “Plus” sign.
Step 8: Click on “Add Printer or Scanner.”
Step 9: Choose your HP printer from the printer list.
Step 10: Click on the “Print Using” or “Use” box.
Step 11: Choose “AirPrint,” “Secure AirPrint” or your printer’s name if it is displayed.
Step 12: Click on “Add.”
This action will add your HP printer to the printer list.
Check if the issue is resolved.
If the issue remains unresolved, try the next solution.
4. Check your Paper Source Setting – HP Printer Warning Lights on HP Ink Tank 110 Printers
To check your paper source setting, follow the steps below:
Note: For printers with one paper tray, you don’t need to try this solution; jump to the next solution.
Step 1: Take out the loaded paper from all input trays of your HP printer.
Step 2: Reload the trays with paper.
Step 3: Move the paper guides on the tray to rest on the side of the loaded paper stack.
Ensure that the guides don’t squeeze the paper stack.
Step 4: Open the program you intend to print from.
Step 5: Click on “File.”
Step 6: Click on “Print.”
Step 7: Choose your HP printer from the drop-down list for “Printer.”
Step 8: Choose the “Media & Quality” or “Paper Type/Quality” menu.
Step 9: Click on “Source” or “Feed from” to choose the right paper tray.
Check if the issue is resolved.
If the issue remains unresolved, try the next solution.
5. Update your HP Printer Firmware – HP Printer Warning Lights on HP Ink Tank 110 Printers
To update your HP printer, click this link: Update your HP Printer Firmware – HP Printer is Slow, and then use any of the methods we shared to update your HP printer firmware.
Blinking Warning and Error Lights – HP Printer Warning Lights on HP Ink Tank 110 Printers
This occurs when the maximum number of primes of the installed printheads is reached. In such a case, you need to replace the printheads to fix the problem.
To replace the printhead, follow the steps we shared under the “Replace the Printhead in HP Ink Tank 110 Printers” section of this article.
After replacing the printhead, you need to prime your printer’s ink system and also align the printhead. To do this, follow the instructions under the “Prime your Printer’s Ink System & Align the Installed Printhead” section of this article.
Blinking Warning and Resume Lights – HP Printer Warning Lights on HP Ink Tank 110 Printers
This happens when the input tray is out of paper or when a paper jam has occurred.
If your printer’s input tray is out of paper, load paper into the tray. After that, press the printer’s “Resume” button to resume printing.
If your printer’s input tray still has paper, then it means there is a paper jam. Therefore, you need to remove the jammed paper. After clearing the paper jam, press the printer’s “Resume” button to resume printing.
How to Clear Paper Jam in HP Ink Tank 110 Printers – HP Printer Warning Lights on HP Ink Tank 110 Printers
To clear paper jams in an HP Ink Tank printer, do the following tasks:
1. Locate the Jammed Paper – HP Printer Warning Lights on HP Ink Tank 110 Printers
Since there are different areas of your printer where paper jams can occur, we have provided you with instructions below on how to clear paper jams from different areas of your HP Ink Tank printer.
How to Clear Paper Jam from Input Tray
To clear the paper jam from your printer’s input tray, follow the steps below:
Step 1: Take out the paper from your printer’s input tray.
Step 2: Press the printer’s “Cancel” button.
This should clear the jam automatically.
However, if it doesn’t, continue with the next step.
Step 3: Slowly pull the jammed paper from your printer’s input tray using both hands.
Step 4: If there are torn paper pieces or foreign objects within the printer’s input tray, ensure that you remove them.
This action will prevent further jams.
Step 5: Load your printer’s input tray with plain paper.
Ensure that you don’t overload the input tray with excess paper.
Step 6: Press the printer’s “Resume” button to resume printing.
If it fails to print and the lights continue to blink, check the next area for a paper jam.
How to Clear Paper Jam from Output Tray
To clear the paper jam from your printer’s output tray, follow the steps below:
Step 1: Press the printer’s “Cancel” button.
This should clear the jam automatically.
However, if it doesn’t, continue with the next step.
Step 2: Slowly pull the jammed paper from your printer’s output tray using both hands.
Step 3: If there are torn paper pieces or foreign objects within the printer’s output tray, ensure that you remove them.
This action will prevent further jams.
Step 4: Press the printer’s “Resume” button to resume printing.
If it fails to print and the lights continue to blink, check the next area for a paper jam.
How to Clear Paper Jam from Printhead Access Area
To clear the paper jam from your printer’s printhead access area, follow the steps below:
Step 1: Press the printer’s “Cancel” button.
This should clear the jam automatically.
However, if it doesn’t, continue with the next step.
Step 2: Turn your HP printer off.
Step 3: Remove the USB cord (if connected) from your printer.
Step 4: Remove the printer’s power cable from your HP printer.
Warning: Ensure that you remove the power cable from your HP printer before placing your hand inside your printer to prevent electric shock or injuries.
Step 5: Close your printer’s output tray extender.
Step 6: Push the output tray into your HP printer.
Step 7: Open your printer’s exterior door.
Step 8: Open your printer’s printhead access door.
Step 9: Ensure that the latch of the printhead is properly closed.
Caution: Don’t press down the printhead latch unless it is closed.
Step 10: Confirm that there is no obstruction in the path of the carriage.
Step 11: Slide the carriage to the right side of your printer if it is in the middle.
Step 12: Slowly pull the jammed paper from your printer’s printhead access area using both hands.
Step 13: If there are torn paper pieces or foreign objects within the printer’s printhead access area, ensure that you remove them.
This action will prevent further jams.
Step 14: Close your printer’s printhead access door.
Step 15: Close your printer’s exterior door.
Step 16: Pull out your printer’s output tray.
Step 17: Lift the output tray extender.
Step 18: Plug the printer’s power cable into your HP printer.
Step 19: If necessary, plug the USB cord into your HP printer.
Step 20: Turn on your HP printer.
Print a document.
If it fails to print and the lights continue to blink, check the next area for a paper jam.
How to Clear Paper Jam from Underneath your printer
To clear the paper jam from underneath your printer, follow the steps below:
Caution: Doing this task might lead to ink leakage because the printer has to be on its back.
Step 1: Press the printer’s “Cancel” button.
This should clear the jam automatically.
However, if it doesn’t, continue with the next step.
Step 2: Turn your HP printer off.
Step 3: Remove the USB cord (if connected) from your printer.
Step 4: Remove the printer’s power cable from your HP printer.
Warning: Ensure that you remove the power cable from your HP printer before placing your hand inside your printer to prevent electric shock or injuries.
Step 5: Close your printer’s output tray extender.
Step 6: Push the output tray into your HP printer.
Step 7: Ensure that the plugs of the ink tank are securely inserted in their plug holes.
This is important to prevent ink leakage.
Step 8: Hold the printer’s input tray with one hand and then lift and turn over your printer slowly, and then place it on its back.
Caution: Don’t turn your printer on either side as it can cause ink leakage.
Step 9: Open the cleanout door by pulling the tabs on both sides.
Step 10: Slowly pull the jammed paper from your printer using both hands.
Step 11: Close the cleanout door by gently pushing it forward.
Step 12: Return your printer to its normal position.
Step 13: Plug the printer’s power cable into your HP printer.
Step 14: If necessary, plug the USB cord into your HP printer.
Step 15: Turn on your HP printer.
Print a document.
If it fails to print and the lights continue to blink, do the next task.
2. Ensure that the Carriage is Moving Freely – HP Printer Warning Lights on HP Ink Tank 110 Printers
To ensure that the carriage is moving freely, do the steps below:
Step 1: If your printer isn’t turned on, turn it on.
Step 2: Open your printer’s exterior door.
Step 3: Open your printer’s printhead access door.
Step 4: Remove the printer’s power cable from your HP printer.
Step 4: Remove the printer’s power cable from the electrical wall outlet or power source.
Warning: Ensure that you remove the power cable from your HP printer before placing your hand inside your printer to prevent electric shock or injuries.
Step 5: Look for and remove any foreign object or paper that might be obstructing the carriage from moving freely.
Caution: In the event that the paper gets torn when you try to pull it out from the rollers, inspect the rollers as well as the wheels for the torn paper pieces. Remove the pieces when you find them. This is important to prevent future jams.
Step 6: Without touching the printhead latch, slide the carriage by placing your hand through the printer’s printhead access door.
- Slide the carriage to the left if the carriage is on the printer’s right side.
- Slide the carriage to the right if the carriage is on the printer’s left side.
- Slide the carriage to the right if the carriage is in the center of your printer.
Step 7: Take out any obstructions or loose paper in the carriage path.
Step 8: Slide the carriage from the left and then to the right to confirm that it is moving freely.
Step 9: Close your printer’s printhead access door.
Step 10: Close your printer’s exterior door.
Step 11: Plug the printer’s power cable into your HP printer.
Step 12: Plug the printer’s power cable into an electrical wall outlet.
Step 13: If necessary, plug the USB cord into your HP printer.
Step 14: Turn on your HP printer.
Print a document.
If it fails to print and the lights continue to blink, do the next task.
3. Clean the Ink Smears via an Automated Tool – HP Printer Warning Lights on HP Ink Tank 110 Printers
To clean the ink smears on your printer, do the steps below:
Note: Cleaning the ink smears on your printer can aid in clearing jams, and also optimize your print quality.
Step 1: Press down the printer’s “Power” button.
Step 2: Press the printer’s “Cancel” button 3 times.
Step 3: Press the printer’s “Resume” button 8 times.
Step 4: Let go of the printer’s “Power” button.
Your printer will feed a sheet of paper slowly and then make some noises.
Step 5: Wait for the printer to become silent and idle before you continue.
Print a document.
If it fails to print and the lights continue to blink, do the next task.
4. Clean the Input Tray Paper Rollers Manually – HP Printer Warning Lights on HP Ink Tank 110 Printers
To clean the input tray paper rollers manually, do the following steps:
Step 1: Turn your HP printer off.
Step 2: Remove the USB cord (if connected) from your printer.
Step 3: Remove the printer’s power cable from your HP printer.
Warning: Ensure that you remove the power cable from your HP printer before placing your hand inside your printer to prevent electric shock or injuries.
Step 4: Lift the printer’s input tray.
Step 5: Raise and hold the printer’s input tray shield.
Caution: Don’t remove the tray shield during this cleaning process as the shield prevents debris and other foreign materials from entering the printer’s paper path. This protection prevents the occurrence of paper jams.
Step 6: Locate the paper pick rollers.
Step 7: Get a long cotton swab and dampen it using distilled water.
Step 8: Squeeze excess water from the swab.
Step 9: Press the cotton swab to rest on the rollers.
Step 10: Use your fingers to rotate the rollers in an upward motion. Apply some pressure to ensure the removal of dirt buildup and dust.
Step 11: Return the printer’s input tray shield to its original position.
Step 12: Wait for about 10 minutes for the pickup rollers to get dry.
Step 13: Plug the printer’s power cable into your HP printer.
Step 14: If necessary, plug the USB cord into your HP printer.
Step 15: Turn on your HP printer.
Print a document.
If it fails to print and the lights continue to blink, do the next task.
5. Reset your HP Ink Tank 110 Printer – HP Printer Warning Lights on HP Ink Tank 110 Printers
To reset an HP Ink Tank printer, follow the steps we shared under the “Reset HP Ink Tank 110 Printers” subsection of this article.
After resetting the printer, print a document.
If it fails to print and the lights continue to blink, then you need to service your HP printer.
To service your HP printer, contact HP Customer Support and fix a repair date for your printer. If you live in the Asia Pacific, you will be redirected to a service center close to you.
Printers that are still under warranty will be repaired for free. However, if your printer is no longer under warranty, you will pay the repair fees.
We also recommend that you read the following paper jam-related articles:
HP Paper Jam Error Codes [How to Fix]
HP Printer ADF Jam [How to Fix]
HP Printer Jam in Tray 1 [How to Fix]
HP Printer Jam in Tray 2 [How to Fix]
HP Printer Jam in Tray 3 [How to Fix]
HP Printer Jam [Issues & Solutions]
Blinking Error, Resume, and Printhead Lights – HP Printer Warning Lights on HP Ink Tank 110 Printers
When this happens, it means that the printhead carriage is not moving freely as a result of an obstruction or jam. Therefore, to fix this problem, you need to get rid of the obstruction or jam.
How to Fix Carriage Jam on HP Ink Tank 110 Printers – HP Printer Warning Lights on HP Ink Tank 110 Printers
To fix the carriage jam on HP Ink Tank 110 printers, do the following tasks:
1. Check for Jammed Paper – HP Printer Warning Lights on HP Ink Tank 110 Printers
To check for jammed paper in an HP Ink Tank 110 printer, follow the instructions we shared under the “Locate the Jammed Paper” section of this article.
After clearing the paper jam and the issue persists, do the next task.
2. Ensure that the Printhead Carriage is Moving Freely – HP Printer Warning Lights on HP Ink Tank 110 Printers
To ensure that the printhead carriage is moving freely, follow the steps we shared under the “Ensure that the Carriage is Moving Freely” section of this article.
Once you are certain that the carriage is moving freely, check if the issue is resolved.
If the issue persists, do the next task.
3. Plug your Printer’s Power Cable Straight into a Wall Outlet – HP Printer Warning Lights on HP Ink Tank 110 Printers
Follow the steps below to plug your HP printer’s power cable directly into a wall outlet:
Step 1: Remove the printer’s power cable from your HP printer.
Step 2: Remove the printer’s power cable from its connected power source (surge protectors, power strips, etc.)
Step 3: Connect the printer’s power cable directly to a wall outlet.
Step 4: Plug the cable into your HP printer.
Step 5: Turn on your HP printer.
Check if the issue is resolved.
If you still experience the issue, use another outlet as the problem might be the result of a bad electrical wall outlet.
If using the second outlet doesn’t fix the problem, do the next task.
4. Reset your printer – HP Printer Warning Lights on HP Ink Tank 110 Printers
To reset an HP Ink Tank printer, follow the steps we shared under the “Reset HP Ink Tank 110 Printers” section of this article.
After resetting the printer, print a document.
If it fails to print and the lights continue to blink, 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.
Blinking Warning Light – HP Printer Warning Lights on HP Ink Tank 110 Printers
This is an indication that your HP printer has entered an error state. To resolve this error, do the following solutions:
1. Reset your HP Printer – HP Printer Warning Lights on HP Ink Tank 110 Printers
To reset an HP Ink Tank printer, follow the steps we shared under the “Reset HP Ink Tank 110 Printers” subsection of this article.
After resetting the printer, check if the error is resolved.
If the error persists, do the next solution.
2. Plug your Printer’s Power Cable Straight into a Wall Outlet – HP Printer Warning Lights on HP Ink Tank 110 Printers
To plug your printer’s power cable into a wall outlet directly, follow the steps we shared under the “Plug your Printer’s Power Cable Straight into a Wall Outlet” section of this article.
Check if the error is resolved after doing this.
If the error is unresolved, then you need to service your HP printer.
Solid Warning Light – HP Printer Warning Lights on HP Ink Tank 110 Printers
When the warning light becomes solid, and your printer prints an Ink System Maintenance page and also displays this message on your computer: “Action Required,” it means that your printer has detected and requires ink system maintenance or 1200 pages have been printed.
To fix this problem, do the following:
1. Check and confirm that you have ink in all the tanks.
If any tank has ink below the minimum fill line, you need to refill that tank.
2. Open and then completely close the printer’s exterior door and the printhead access door.
Note: The recommendation from HP is that the printhead access door should be opened and then closed 3 to 4 times for proper removal of ink buildup and optimization of print quality.
Caution: When doing the process above, ensure that you don’t touch the latch of the printhead as doing so might leave the carriage open and cause ink system damage.
