HP Color LaserJet MFP M477fdn Service 79 error

[jmn64]

I know there have been older threads on this issue, but a brand new hp m477 is in an infinite reboot loop ending in error 79 in a network with a Unifi 4P GW and multiple 48 & 24 Unifi POE Switches.   I was told by HP support that they believe a bad print file caused the initial error 79 (firmware crash from what I've been told from malformed pdf file...which never had any issues before...but thats another rant).  I was even sent a replacement printer after spending a few hours trying debug this issue the first time it occured.  Even after clearing all print jobs and physically isolating the printer on the network, the printer still crashes shortly after rebooting and obtaining IP address (or just connecting with a manual IP address).  I reemove the network cable and there are no problems printing over USB.  I should mention that IPV6 is disabled and there appears to be no problems when in a network with a non-Unifi GW.    The only way to stop the reboot cycle is to disable WS-Scan and WS-Discovery in the advance network settings on the HP m477 printer.  HP support has no idea why.

[jmn64]

I noticed Hp issued a firmware update, date code 20190113, that "Fixed an issue that printer would continuous reboot with a 79 error under certain network environment."   I downloaded and re-enabled WS-Discovery, WS-Print, and WS-Scan and life is good.  No more reboots or error code 79.  I'll report back later if this changes.    I'm really pissed that HP support refused to even acknowledge the possibility the error I was seeing their problem.  I'm glad someone got through to the right support technician.  Unfortunately, that wasn't me.  In any case, I'm glad it is fixed.    My kids can start using the HP Scan And Capture App in Windows 10 again.