Omen 17-cb1176ng BIOS F.44 Rev.A - INVALID CMOS CHECKSUM - need older bios

[Hw31]

looking for an older bios version. preferably version which is flashable via hp bios recovery. THX!

[SMDFlea]

looking for an older bios version. preferably version which is flashable via hp bios recovery. THX!

All previous bios update versions are available at HP support. Don`t know which one`s support USB recovery just go though them all starting with the oldest.

Click on the + to expand


Click on the + to expand Previous version

[Hw31]

thx. unfortunatly bios downgrade doesnt seem to work. i gues my only option is to wait for a newer bios update or desolder the bios ic and flash the bios manualy.

[SMDFlea]

thx. unfortunatly bios downgrade doesnt seem to work. i gues my only option is to wait for a newer bios update or desolder the bios ic and flash the bios manualy.

Did you check the CMOS battery voltage

[Hw31]

Hey guys,

could someone please tell me the name of the bios ic and maybe explain to me how to read the marking and find the name myself? Googling the marking led to nothing useful. Thx

Beste regards

[SMDFlea]

Hey guys,

could someone please tell me the name of the bios ic and maybe explain to me how to read the marking and find the name myself? Googling the marking led to nothing useful. Thx

Beste regards

QH128AHIG Datasheet https://www.badcaps.net/forum/troubl...95#post1594795

[SMDFlea]

Did you check the CMOS battery voltage

So after a bit of googling i found out there is no seperate CMOS battery on this model , the CMOS is powered by the main battery

[Hw31]

QH128AHIG Datasheet https://www.badcaps.net/forum/troubl...95#post1594795

Feel blind right now 🥴

• So after a bit of googling i found out there is no seperate CMOS battery on this model , the CMOS is powered by the main battery

  ---

  + More Options

I replaced the main battery already. So my assumption that the bios version 44 is corrupt and flashing the bios with an older version via programmer may be right? I guess the bios ic itself could be faulty too but I red that that HP f'ed up bios versions for other models lately ...

[Hw31]

flashing f43 bios via t48 programmer fixed the issue. so the cmos ic was ok. i cant say if the version f44 is faulty or if the hp bios recovery couldnt do its job properly as i didnt try to flash version f44 via t48. thx for your help!