HP Color Laserjet issue

Since this site is a Q&A for system administrators and desktop support professionals I'd decided to post my question here. Not sure if this is the best stackexchange website for this.

We have an HP Color Laserjet 4700n of course out of warranty. And we have an 49.4CF2 Service error. According to several sources online, this is firmware related.

When I switch of the printer and switch it back on, it gives this error again. I have tried to give it a cold reset. But that didn't work either. I have downloaded both firmware downloads from hp.com first one has an application which transfers the firmware to the printer, but after about 5% the printer switches again to 49.4CF2 Service error. I also tried the second firmware. So I used filezilla to transfer the .rfu file. The start of the transfer looked good. But again, after about 5% there was a lost connection.

I do not know what else I can try to resolve this error.

p.s. ping-ing the printer works. but stops when the error occurs. same for webinterface of the network printer.

EDIT: as Jan Marek and Ezio Zanghellini said: the firmware is still not updated. Seems impossible!

Solution 1:

Seems that it is solved!

Since I am no expert in the kitchen with ovens etc. I had decided to skip Pauska's solution (sorry, nothing personal)

I disconnected the network cable. The printer boots fine then. But I can only print by network. So I reconnected it and changed the static IP address from .190 to .192 (on the end) and reconfigured a lot of pc's to use the new (lan) ip.

And the service error is gone. I still have no idea what might have caused this. Maybe a PC in the LAN keeps sending wrong stuff to the 192.168.1.190 IP address?

Solution 2:

I've heard about people baking the formatter (yes, in a oven) to fix bad soldering on the HP P2015.. It's a crazy idea, but perhaps it would work as a last resort.

See this or this video (warning, loud music).