My Laser Jet M551 has stop printing from my USB cable from my computer.

[lori329]

My Laserjet M551 printer has stopped printing from my USB cable for my Mac Book Pro Sonoma version.  It has never been able to read from the USB input on the printer.

I get

ERROR: undefended

OFFENDING COMMAND: MS-Bold-861 code

I have unplugged from the wall and restarted my computer. I did print one time after that but is again giving the same error code. Please help.

Thank you,

Lori Hiatt

[Sneha_01]

Hi @lori329 

Welcome to HP Support Community.

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

It sounds like you're encountering a frustrating issue with your LaserJet M551. Here are some steps you can take to troubleshoot the "ERROR: undefended" and "OFFENDING COMMAND: MS-Bold-861 code" errors when printing via USB from your MacBook Pro:

1. Check Printer and USB Connections:

• Ensure the USB cable is securely connected to both the printer and the MacBook.
• If possible, try using a different USB cable to rule out a faulty cable.

2. Update Printer Drivers:

• Make sure you have the latest drivers for the LaserJet M551:
  • Go to the HP Support website.
  • Download and install the latest driver compatible with macOS Sonoma.

3. Reset the Printing System:

• Resetting the printing system can sometimes resolve persistent printing issues:
  • Go to System Preferences > Printers & Scanners.
  • Right-click (or Control-click) in the Printers list and select Reset printing system.
  • This will remove all printers from your list, so you will need to add your printer again afterward.

4. Reinstall the Printer:

• After resetting the printing system, add the printer back:
  • In Printers & Scanners, click the + button to add your LaserJet M551.
  • Select the printer from the list and install it.

5. Check Print Settings:

• Ensure that the print settings are correct:
  • When you go to print, check the print dialog for any unusual settings or options that might be causing the error. You may want to set the print quality to a different option (like Standard or Draft) to see if that resolves the issue.

6. Try a Different File or Application:

• Sometimes, specific files or applications can cause issues. Try printing from a different application or a different document to see if the problem persists.

7. Firmware Update:

• Check if there is a firmware update available for your printer on the HP Support website.

I hope this helps.

Take care and have a good day.

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.

Rachel571

HP Support