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- HP Community
- Printers
- Printing Errors or Lights & Stuck Print Jobs
- HP LaserJet Mfp M236d 49

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07-17-2025 07:25 AM
Hi @Idowu05,
Welcome to the HP Support Community.
 
Thank you for posting your query. I will be glad to help you.
I understand that your HP LaserJet MFP M236d showing Error 77 after a 49 error typically indicates a firmware or internal hardware issue. Let’s break this down and walk through a solution.
Steps to Resolve Error 49
- Power Cycle the Printer:
  - Turn off the printer.
- Unplug it from the wall.
- Wait 30 seconds, then plug it back in and turn it on.
 
- Bypass Surge Protectors:
  - Plug the printer directly into a wall outlet, not a surge protector or UPS.
 
- Disconnect All Cables:
  - Turn off the printer.
- Disconnect USB, Ethernet, or Wi-Fi connections.
- Turn it back on and see if the error clears.
 
- Update Firmware:
  - If the printer starts normally, update the firmware: 🔗 HP LaserJet MFP M236d Printer - Troubleshooting | HP® Support
 
- Try a Different Print Driver:
  - If the error occurs while printing a specific file, try:
    - Saving the file in a different format (e.g., PDF).
- Using a different driver (e.g., PCL6 instead of UPD).
 
 
- If the error occurs while printing a specific file, try:
    
Error 77 – Fuser or Hardware Error
This error typically indicates a hardware fault, often related to the fuser unit or power supply.
✅ Steps to Resolve Error 77
- Power Reset:
  - Turn off the printer.
- Unplug it for 60 seconds.
- Plug it back in and power on.
 
- Check for Overheating or Power Issues:
  - Ensure the printer is in a cool, ventilated area.
- Avoid using extension cords or surge protectors.
 
- Check for Firmware Updates:
  - If the printer boots, update the firmware as above.
 
- If Error Persists:
  - This may require service or part replacement (e.g., fuser unit).
 
I hope this helps.
Take care, and have an amazing day!
 
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Regards,
VikramTheGreat
