HP color laserjet M281fdw fax does not work

[JAVD]

HP color laserjet M281fdw - cannot receive or send a fax the code is 79 and the  screen has message that reads Fax hardware is either missing or not seated

[Max3Aj]

@JAVD, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
The error you're seeing "Fax hardware is either missing or not seated" along with Error Code 79 typically indicates a firmware-level fault or hardware detection issue with the fax module in your HP Color LaserJet Pro MFP M281fdw.

Here are the steps to troubleshoot and resolve this issue:

Power Cycle the Printer

• Turn off the printer using the power button.
• Unplug the power cord from the wall outlet.
• Wait at least 60 seconds.
• Plug the printer directly into a wall outlet (avoid surge protectors).
• Turn the printer back on and check if the error clears.

Check Fax Hardware Seating

• Open the printer’s access panels and ensure all internal components are properly seated.
• Gently press down on any visible modules or connectors.

Run a Fax Test

• On the printer control panel, go to:
  • Setup > Fax Setup > Fax Reports > Run Fax Test
• Review the report for any failed tests and follow the suggested actions.

Check Phone Line Connection

• Ensure the phone line is connected to the 1-LINE port on the back of the printer.
• If using a DSL or VoIP line, make sure a high-pass filter is installed.
• Try connecting the printer to a dedicated analog line.

Update Printer Firmware

• Visit the HP Software and Driver Downloads page and check for the latest firmware.
• Follow the instructions to update via USB or network.

Firmware updates often resolve internal errors like code 79

You may refer to these documents - 79 Error (or 79 Service Error), Turn off then on | HP® Support

>HP printers and fax machines - Resolve fax problems | HP® Support

>HP LaserJet Pro MFP - Solve problems sending or receiving faxes (including fax error messages) | HP®...

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. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support