Introduction
The lights on the control panel indicate the product status. These lights can be on, off, or blinking, depending on the status of the product. The lights can all blink in distinct patterns to indicate the product status or potential error conditions.

NOTE:This document describes the light patterns on your product as blinking or flashing lights. In this document, "flashing" means the same as "blinking."The product in the illustration below might not look exactly like your product, but the control panel buttons are the same.
Figure 1: HP LaserJet Pro P1566

1 - Toner light
2 - Attention light
3 - Ready light
4 - Go light
5 - Go button
6 - Cancel button
![]() | Symbol for “light off” |
![]() | Symbol for “light on” |
![]() | Symbol for “light blinking” |
Blinking lights
The following sections describe the most common combinations of blinking lights, followed by solutions for each combination. Find the blinking lights pattern you are experiencing, and then follow the steps to resolve the issue.

NOTE:There might be more than one solution for some blinking lights patterns. After you find the pattern that matches your blinking lights pattern, try each solution to resolve the issue.
| Issue: All lights off |
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| Issue: All lights off and Power button backlight on |
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The formatter might not be connected to the product correctly. Follow these steps to restart the product.
- Press the Power button (
) to turn off the product. - Wait 30 seconds, and then press the Power button (
) to turn on the product. - Wait for the product to initialize.
| Issue: Attention, Ready, and Go lights cycle |
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| Issue: All lights cycle |
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| Issue: Ready light on |
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| Issue: Ready light blinking |
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| Issue: Attention light blinking |
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The product has experienced an error that can be corrected at the product, such as no packing material inside the product, an open door, no paper in the proper tray, a missing print cartridge, or a paper jam.
IMPORTANT:
You must follow these solutions in the order presented
to resolve the issue.Solution one: Check to make sure that there is no packing material inside the product
Follow these steps to check for and remove any packing material from inside the product.
- Open the print cartridge door.
- Lift up the paper packing, but do not remove it.
- Remove the print cartridge packing material.
- Remove the print cartridge from the product.
CAUTION:To prevent damage to the print cartridge, hold the print cartridge at each end. - Remove the packing material from inside the product.
- Remove the orange clip from the end of the print cartridge.
- Gently rock the print cartridge back and forth to distribute the toner evenly.
- Bend the tab on the left side of the print cartridge until the tab breaks loose. Pull the tab to remove all the sealing tape from the print cartridge.
CAUTION:If toner gets on your clothing, wipe it off with a dry cloth and wash the clothing in cold water. Hot water sets toner into the fabric . - Insert the print cartridge, and then close the print cartridge door.
Solution two: Make sure that the print cartridge door is closed
Follow these steps to open and close the print cartridge door.
Solution three: Check to see if there is paper loaded in the product
If there is no paper loaded in the product, follow these steps to load paper.
- Raise the priority input tray, and then slide the paper length and width guides to their outermost positions.
- Load plain paper in the main input tray with the top forward and the print side up.
- Slide the paper guides inward so that they rest against the stack of paper.
NOTE:To prevent jams and skewing, always adjust the side and front paper guides. - Lower the priority tray.
Solution four: Check to see if the print cartridge is installed
There might not be a print cartridge installed in your product. If there is no cartridge installed in your product, follow these steps to install a new print cartridge.
- Open the print cartridge door.
- Remove the new print cartridge from its package. Place the used print cartridge in the bag and box for recycling.
CAUTION:To prevent damage to the print cartridge, hold the print cartridge at each end. Do not touch the cartridge shutter or the roller surface. - Grasp both sides of the print cartridge and gently rock the print cartridge to distribute the toner evenly inside the print cartridge.
- Bend the tab on the left side of the cartridge until the tab breaks loose, and then pull the tab until all the tape is removed from the cartridge. Place the tab and tape in the print cartridge box to return for recycling.
- Insert the print cartridge in the product, and then close the print cartridge door.
CAUTION:If toner gets on your clothing, wipe it off with a dry cloth and wash the clothing in cold water. Hot water sets toner into the fabric .
Solution five: Check to see if there is a paper jam
There might be paper jammed in your product. Follow these steps clear a paper jam. If the Attention light stops blinking after you remove jammed paper from the product, you can stop troubleshooting.

CAUTION:Before clearing jams, turn the product off, and then disconnect the power cord.

NOTE:When clearing jams, be careful not to tear jammed paper. If a small piece of paper remains in the product, it could cause additional jams
Step one: Locate the jam
Jams can occur at the following locations in the product, and can occur in more than one location.
Step two: Remove any loose paper from the product
Remove any loose sheets of paper from the input tray and the output tray.

CAUTION:Do not remove jammed paper at this stage. Trying to clear jammed paper from the front of the product can damage the
print mechanism.
Step three: Clear a jam from inside the product
Follow these steps to clear a jam from inside the product.
- Open the print cartridge door, and then remove the print cartridge.
- If you can see the jammed paper, carefully grasp the jammed paper, and then slowly pull it out of the product.
- Reinstall the print cartridge, and then close the print cartridge door.
Step four: Clear a jam from the input tray
Follow these steps to clear a jam from the input tray.
- Open the print cartridge door, and then remove the print cartridge.
- Remove the paper stack from the input tray.
- With both hands, grasp the side of the jammed paper that is most visible (this includes the middle), and carefully pull it free from the product.
- Reinstall the print cartridge, and then close the print cartridge door.
Step five: Clear a jam from the output areas
Follow these steps to clear a jam from the output areas.
- Open the print cartridge door, and then remove the print cartridge.
- Keep the print cartridge door open, and then with both hands, grasp the side of the jammed paper that is most visible (this includes the middle), and then carefully pull it free from the product.
- Reinstall the print cartridge, and then close the print cartridge door.
Step six: Clear a jam from the rear of the product (P1606dn only)
Follow these steps to clear a jam from the rear of the product.
- Open the print cartridge door, and then remove the print cartridge.
- Open the rear door.
- With both hands, grasp the side of the jammed paper that is most visible (this includes the middle), and then carefully pull it free from the product.
- Close the rear door.
- Reinstall the print cartridge, and then close the print cartridge door.
| Issue: Attention light blinking and Ready light on |
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The product has experienced a continual error.
Solution one: Recover from the error and print available data
Press the Go button (
) to recover from the error and print the available data.
) to recover from the error and print the available data.- If these steps resolved the issue , you do not need to continue troubleshooting.
- If the issue persists , continue to the next solution.
Solution two: Clear a paper jam
Follow these steps clear a paper jam. If the Attention light stops blinking after you remove jammed paper from the product, you can stop troubleshooting.

CAUTION:Before clearing jams, turn the product off, and then disconnect the power cord.

NOTE:When clearing jams, be careful not to tear jammed paper. If a small piece of paper remains in the product, it could cause additional jams
Step one: Locate the jam
Jams can occur at the following locations in the product, and can occur in more than one location.
Step two: Remove any loose paper from the product
Remove any loose sheets of paper from the input tray and the output tray.

CAUTION:Do not remove jammed paper at this stage. Trying to clear jammed paper from the front of the product can damage the
print mechanism.
Step three: Clear a jam from inside the product
Follow these steps to clear a jam from inside the product.
- Open the print cartridge door, and then remove the print cartridge.
- If you can see the jammed paper, carefully grasp the jammed paper, and then slowly pull it out of the product.
- Reinstall the print cartridge, and then close the print cartridge door.
Step four: Clear a jam from the input tray
Follow these steps to clear a jam from the input tray.
- Open the print cartridge door, and then remove the print cartridge.
- Remove the paper stack from the input tray.
- With both hands, grasp the side of the jammed paper that is most visible (this includes the middle), and carefully pull it free from the product.
- Reinstall the print cartridge, and then close the print cartridge door.
Step five: Clear a jam from the output areas
Follow these steps to clear a jam from the output areas.
- Open the print cartridge door, and then remove the print cartridge.
- Keep the print cartridge door open, and then with both hands, grasp the side of the jammed paper that is most visible (this includes the middle), and then carefully pull it free from the product.
- Reinstall the print cartridge, and then close the print cartridge door.
Step six: Clear a jam from the rear of the product (P1606dn only)
Follow these steps to clear a jam from the rear of the product.
- Open the print cartridge door, and then remove the print cartridge.
- Open the rear door.
- With both hands, grasp the side of the jammed paper that is most visible (this includes the middle), and then carefully pull it free from the product.
- Close the rear door.
- Reinstall the print cartridge, and then close the print cartridge door.
| Issue: Attention, Ready, and Go lights on |
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The product has experienced a fatal error from which it cannot recover. Follow the steps below to restart the product.
- Press the Power Button (
) to turn off the product. - Disconnect the power cord from the back of the product, and then wait 30 seconds.
- Reconnect the power cord to the back of the product.
- Press the Power Button (
) to turn on the product.
| Issue: Ready and Toner lights on |
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The print cartridge is near the estimated end of life. Follow these steps to install a new print cartridge.
- Open the print cartridge door.
- Remove the new print cartridge from its package. Place the used print cartridge in the bag and box for recycling.
CAUTION:To prevent damage to the print cartridge, hold the print cartridge at each end. Do not touch the cartridge shutter or the roller surface. - Grasp both sides of the print cartridge and gently rock the print cartridge to distribute the toner evenly inside the print cartridge.
- Bend the tab on the left side of the cartridge until the tab breaks loose, and then pull the tab until all the tape is removed from the cartridge. Place the tab and tape in the print cartridge box to return for recycling.
- Insert the print cartridge in the product, and then close the print cartridge door.
CAUTION:If toner gets on your clothing, wipe it off with a dry cloth and wash the clothing in cold water. Hot water sets toner into the fabric .
| Issue: Toner light blinking |
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There is packing material inside the product or there is no print cartridge installed. Follow these steps to check to make sure that you have removed the packing material from inside the product or install a print cartridge.
Solution one: Check to make sure that there is no packing material inside the product
Follow these steps to check for and remove any packing material from inside the product.
- Open the print cartridge door.
- Lift up the paper packing, but do not remove it.
- Remove the print cartridge packing material.
- Remove the print cartridge from the product.
CAUTION:To prevent damage to the print cartridge, hold the print cartridge at each end. - Remove the packing material from inside the product.
- Remove the orange clip from the end of the print cartridge.
- Gently rock the print cartridge back and forth to distribute the toner evenly.
- Bend the tab on the left side of the print cartridge until the tab breaks loose. Pull the tab to remove all the sealing tape from the print cartridge.
CAUTION:If toner gets on your clothing, wipe it off with a dry cloth and wash the clothing in cold water. Hot water sets toner into the fabric . - Insert the print cartridge, and then close the print cartridge door.
Solution two: Install a print cartridge
Follow these steps to install a new print cartridge.
- Open the print cartridge door.
- Remove the new print cartridge from its package. Place the used print cartridge in the bag and box for recycling.
CAUTION:To prevent damage to the print cartridge, hold the print cartridge at each end. Do not touch the cartridge shutter or the roller surface. - Grasp both sides of the print cartridge and gently rock the print cartridge to distribute the toner evenly inside the print cartridge.
- Bend the tab on the left side of the cartridge until the tab breaks loose, and then pull the tab until all the tape is removed from the cartridge. Place the tab and tape in the print cartridge box to return for recycling.
- Insert the print cartridge in the product, and then close the print cartridge door.
CAUTION:If toner gets on your clothing, wipe it off with a dry cloth and wash the clothing in cold water. Hot water sets toner into the fabric .
Service the product
If you have completed all the preceding steps and are still experiencing a problem, service the product.
Determine if your product is in warranty or out of warranty. If you need help determining your product’s warranty status, go to
HP’s Warranty Check Tool
.
- If your product is in warranty , contact HP.
- If your product is out of warranty , click here to view additional printer support options starting as low as $20.
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