How to Fix Communication failure on HP Laserjet Pro MFP - Blue paper got disconnected by accident

[Val1213]

I accidently unplugged the blue part from the printer that is located on the top right corner when opening the copier / ADF area. After this mistake I tried to input it back but now the printer does not detect that a paper is loaded in the copier nor does it detect the paper that is placed in the scanner. Is there any way to fix this without getting new parts for this? 

[A_Gayathri · Accepted solution]

Hi @Val1213 ,

Welcome to The HP Support Community.  

Thank you for posting your query, I will be glad to help you.

I understand you accidentally disconnected a part of the printer’s ADF (Automatic Document Feeder) system, which could be causing communication issues between the scanner and the printer. 
 

Here's a step-by-step guide to potentially fix this issue:
 

1. Turn Off and Unplug the Printer

• To prevent any electrical damage, turn off the printer and unplug it from the power source. Wait for at least 30 seconds to ensure the printer's internal systems reset.

2. Check the Connection

• The blue part you mentioned may be a cable or a sensor that connects the ADF area to the printer. Carefully inspect the cable or connection to make sure it’s properly aligned and connected.
• If it's a cable, gently reconnect it, ensuring it’s seated securely without forcing it.

3. Inspect for Jams or Obstructions

• While you’re in the ADF area, check for any paper jams, dust, or debris that might be blocking the sensors or other components.
• Clean the scanner bed and ADF rollers with a lint-free cloth if necessary, but be careful not to damage any parts.

4. Reassemble and Test

• After reconnecting everything properly, close the ADF cover and any other compartments you may have opened.
• Plug the printer back in and turn it on.

5. Check for Software Detection

• Once powered on, check the printer’s display or the HP software on your computer to see if it detects the loaded paper in the ADF or scanner.
• You can also try running a test scan from the HP software to ensure everything is working.

6. Reset the Printer

• If the printer still doesn’t detect paper, try a reset:
  • Press and hold the "Cancel" button on the printer for about 10 seconds to perform a hard reset.
  • Alternatively, reset the printer via its settings menu: Setup > Printer Maintenance > Restore Defaults.

7. Check for Firmware Updates

• If there is a firmware update available for your printer, installing it may help resolve communication issues. You can check for updates via the printer’s control panel or by visiting HP’s official support website.

8. Test Functionality

• Try placing paper in the ADF again and scanning a document to see if the problem is resolved.

Refer to this document: HP LaserJet Pro MFP M428fdw USer manual 

I hope this helps. 

Take care and have a good day.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Val1213]

Hi Gaya1239,

I greatly appreciate you taking the time to send this. 

I followed your instructions, and realized I wasn't inputting the blue part back correctly as it needed to be. 

Once I finally turned on the printer, it detected the loaded paper. Praise the Lord. 

Thank you so much again!

Hope this can help someone else.

[A_Gayathri]

HI @Val1213 ,

I'm so glad to hear that the instructions helped and that your printer is working correctly again! Sometimes the smallest adjustments make a big difference. Thank you for sharing your experience, and I hope everything continues to run smoothly for you. If any other issues come up, feel free to reach out.

If the information I've provided was helpful, give us some reinforcement by clicking the Accept as Solution on the public post, that'll help us and others see that we've got the answers!

Have a great day ahead! 

Gaya1239 

HP Support