I have several HP Color LaserJet Enterprise M553's.
Recently I had the eMMC die on one of them. I have replaced the board and the eMMC to get the printer back up and running. While replacing those two items has got the printer back up, it has broke the web interface and telnet.
I have tried reimaging the printer locally using the USB port. I have tried connecting and modifying the settings through the Web Jetadmin. While it looks like it is connecting and has changed a couple settings, like the name, nothing else is changing.
Currently the most I can do is turn it on and let it grab an IP from DHCP server. Driver settings from the server work, but that is as far as it goes. I need to be able to get to the web interface to properly adjust local settings on the printer.