Workcentre 7845 Alt boot fails.

[Melman198918-ASP]

I'm having an issue with a Workcentre 7845 not completeing the alt boot. It get to network controller and checks that off but never starts with copy controller, print/copy engine or scan engine. The post code is u with flashing decimal. Procedure says to replace hard drive which I have, and then sbc pwb which I've also replaced. Still having the same issue. Spoke with a Xerox hardware engineer who told me to replace the dimms on the board. Replaced both sets. Still having the same issue. Any ideas?

[GabiE-Xerox]

Hi,

Have you tried the FORCED_UPGRADE altboot method?

Gabi

[Melman198918-ASP]

Yes. Pretty much the only time I don't do force upgrade is if I'm trying to save info on the machine. 

I thought it could possibly be an SD card but I tried that too since the firmware is housed on it.

[GabiE-Xerox]

Try also with IGNORE_MISSING_MODULE file in altboot folder.

[Melman198918-ASP]

Where do I find that? The bus?

[GabiE-Xerox]

You can do it yourself. It is just a simple file with no extension like FORCEDD_UPGRADE. In AltBoot folder click right in a blank area select "NEW", select "Text Document", name it IGNORE_MISSING_MODULES, delete his .txt extension.

So, in AltBoot folder put the software .dlm, the FORCED_UPGRADE file and the IGNORE_MISSING MODULES file.

[Melman198918-ASP]

Thanks I'll try that.

[Anne22]

I have not resolved the issue yet, but another tech took a look and said the SIM card is missing. Do you know if that would cause this issue? I cannot get any other information besides that.

[GabiE-Xerox]

No. The SIM card is used just at the first instalation of the machine.

[Melman198918-ASP]

Tried that but still got the same result. When the upgrade starts it jumps pretty quick to halfway finished
on Network Controller and then within a couple of minutes network controller is done. It never goes any further after that.