79 Service Error and MFP M477fdw printer continuously restarting

[mikeinsf]

For the past several days, my printer has been cycling on and off and showing "Error 79" when it restarts.

I disconnected the printer from the network, powered off the router, turned off the printer, waited for 30 seconds. turned the printer back on, turned off IPv6 (actually, it was already off) and then turned it back on again. When I reconnected to the network, the problem resumed. 

Please let me know if there are any other steps I should take. I'm running Mac OS Big Sur

[Anderson_CR]

Hello,

Hope you are well, please go to system preferences > printers and scanners and please remove the printer icon.

Then please perform a factory reset on the printer, from set up , please go to service and perform factory reset. 

After that, before connecting the printer back to network, please print a configuration report from the set up menu of the printer and make sure there is no 49 or 79 errors, if its able to print fine, printer is working fine.

Restart computer and modem. Proceed to reconnect printer to the network and make sure the 49 or 79 error is not coming up as soon as the printer is connected to network, if no errors, please reinstall the printer in the computer, just by adding it from the printer and scanners menu.

if errors are coming back just by reconnecting the printer to the network, please make sure there non pending jobs from the computer or any other device that can print to this printer.

Regards,

[jcarey79]

This solution worked very well. Thanks for posting it.

[R_Schorfhaar]

I had the same problem last week with a MFP M477FDW. HP Support claimed it to be a network error. Since the reboot did not occur when the ethernet cable was disconnected. I also updated the firmware using USB. No difference. Only resetting the device to factory defaults helped. But this wasn't  as easy as I thought! Finally got the answer from HP. When booting the device press you're finger on the bottom left where the white bar starts to fill. Hold it until you see "Permanent storage init". Release the finger. Now the device will be resetting. After this operation connecting the ethernet didn't end up in the erro 79 reset / boot loop. Hope this will help others.