BIOS resets every time power is off

[TW]Fox · 2 Jan 2010 at 11:26

Hi guys,

Got a 5-6 year old Shuttle SN45G2 which recently has begun forgetting everything when its powered off at the mains. No problem I thought - new CMOS battery time.

However a new battery has not helped. What could be wrong? Broken motherboard?

J.B · 2 Jan 2010 at 11:36

Could be a borked chip which I think is pretty fatal unless you can find a replacement BIOS chip.

Could try flashing with a new BIOS but I dont think it would help.

Liking the new avatar BTW!

Mr-White · 2 Jan 2010 at 11:59

Have you tried re-flashing the bios ?

MW

Fred · 2 Jan 2010 at 12:37

Battery is the most obvious answer, however since you've tried that...

Battery contacts ok? dust etc..
Are you changing any settings it might not like anymore, and therefore is resetting to defaults?

IAmATeaf · 2 Jan 2010 at 17:03

Have you done a reset of the BIOS to defaults since changing the battery?

Hairy · 2 Jan 2010 at 17:19

Have you checked the bios clear jumpers?

make sure nothing has made a connection (once had this problem with a fallen screw!!)

scotty365 · 2 Jan 2010 at 17:46

Had a similar prob with battery corrosion on the mobo - (was an old 486 though about 5 years old at the time)

zovirax · 2 Jan 2010 at 18:17

if the clear cmos jumper wasnt in the run position nothing would happen when the power button was pressed so it cant be that.

Happy · 2 Jan 2010 at 18:18

Another vote here for checking/cleaning the battery contacts.

zovirax · 2 Jan 2010 at 18:21

When the CMOS battery is on the mobo use a multimetre to check it has 3v+ in it. I think you use red probe to outside of battery then black probe to earth, ground.

asoxedri · 2 Jan 2010 at 18:51

i got this problem too, my case is spotless so its not contact.