Ethernet controller on dc7800 is absent after bios update to v1.35

[alex3972]

After updating the bios on my dc7800 from v1.04 to v1.35, the ethernet controller is no longer listed in the PCI Devices list.

I would like a copy of the v1.04 bios so that I can restore to that version. Is this available anywhere? I've been unable to locate the earlier version anywhere in the HP downloads. As far as I can tell, the dc7800 doesn't have an on-board backup of the earlier version, tho I'd be happy to discover otherwise.

Alternatively, has anyone experienced this problem before, and could advise me on how to get the bios to recognise the ethernet controller?

[Paul_Tikkanen · Accepted solution]

Hi:

I have a dc7800 running W10 Pro 64 bit and BIOS v1.35 and the Intel ethernet controller is listed in the device manager, so unfortunately, I have no idea why it disappeared on you.

The only suggestion I can offer, would be to try clearing the CMOS.

Here are all of your previous BIOS revisions...

Version Release date File Size    

1.32 Rev. A	Dec 06, 2011	8.1 MB		Download
1.28 Rev. A	Mar 06, 2009	7.3 MB		Download
1.27 Rev. A	Nov 19, 2008	7.3 MB		Download
1.26 Rev. A	Aug 22, 2008	7.4 MB		Download
1.24 Rev. A	Mar 25, 2008	7.3 MB		Download
1.04 Rev. A	Aug 27, 2007	7.3 MB		Download

[alex3972]

Your CMOS tip ultimately resolved it. I flashed with 1.04, however the bios was unhappy with that and went into bios recovery. I cleared the CMOS, reflashed back to 1.35, and happily my ethernet controller is recognised again.

Thanks very much for your help.

[Paul_Tikkanen]

You're very welcome.