HP LaserJet M477fdw Reboot Loop

[miketranosky]

Hello, 

I have a HP Color LaserJet Pro MFP M477fdw that recently started having some issues.  I connect my printer wireless to the network print wirelessly to the printer.  A few days ago, I had a few documents open on my Mac, attempted to print one of those documents, which ended up sending both documents to the printer.  The first document printed most of the way, I realized it was not the document I wanted and had assumed it had completely printed.  I sent the correct document to the printer, and noticed that the printer rebooted.  It booted about 1/3 of the way on the black screen with the HP Logo (white progress bar on the bottom) and then hangs there for sometimes several minutes, the screen starts to fade to white and then it reboots and starts over.  I turned the power off and looked to printer jams.  I noticed that the last page it spit out was still in the rollers just ever so slightly (just a slight tug with two hands and the entire paper was free) and there was a paper jam in the back when I opened the door, but I still cannot get out of that reboot loop.  I've tried disabling wireless all throughout the house, wiring via Cat6, tried a variety of button combinations (including the invisible buttons just over the back button and just over the question mark) but not sure if I do not have the button combination/timing correct.  I am thinking if I can perform a factory reset, it will be fine, but I cannot seem to get the permanent storage init message no matter what combination I try. 

Does anyone have suggestions/help/direction they can point me in?  I feel like this is just a software issue as I can hear all of the rollers rolling freely when I power on from powered off state and it sounds as though everything is working as it short (no abnormal sounds) and it just will perform a clean boot. 

Thank you very much in advance for any help!

[Repairatrooper · Accepted solution]

Just to clarify because I am not clear if you tried this. Disable wireless, disconnect any network or USB cables and power cycle the printer. If it comes to ready, then  you indeed have some type of stale print job somewhere you need to clear. If it still does not come to ready and you are unable to perform an NVRAM reset then likely the formatter has failed.

[miketranosky]

Thank you for the response! I have disconnected all cables and stopped broadcasting the wireless but the printer just continuously reboots to the HP logo/Energy Star logo but only loads about 1/3 of the white bar at the bottom until it starts to fade out and the reboot. I have seen a lot of posts on the NVRAM reset but not clear on what should be done. Would you mind sharing the correct procedure? I looked up the part for the formatter and may explore that once I confirm and attempt the NVRAM reset procedure. Would the formatted failure cause a failure to boot as I’m describing and would simply just replacing that logic board fix? Thank you again! Much appreciated. 

[miketranosky]

I wanted to say thank you.  I ended up buying a replacement formatter board and that solved the issues.  Thank you again for your input and help!