Need to reset cmos every time

macfanuk · 24 Mar 2011 at 12:05

I have just built a computer using a second hand Gigabyte GA-P55-UD5 motherboard and everytime I disconnect the power cable and plug it back in again, I need to press the CMOS button before it will boot.

Could this just be simply that the cmos battery is on its way out or could it be a more serious fault with the board?

Ginger-Menace · 24 Mar 2011 at 12:06

try a new battery first and see if it helps

joxang · 24 Mar 2011 at 12:15

Does this happen with every restart, or only if you unplug to power cable? If it's the former then it doesn't sound like a dead battery - you might want to try a bios flash to an updated version.

macfanuk · 24 Mar 2011 at 12:31

joxang said:
Does this happen with every restart, or only if you unplug to power cable? If it's the former then it doesn't sound like a dead battery - you might want to try a bios flash to an updated version.

It only happens when the power cable's pulled out. In the past I've known bios clocks reset when the power was pulled, but not when the power cable's left in which is what's led me to think it could be battery. Will try and find a spare battery.

joxang · 24 Mar 2011 at 12:33

macfanuk said:
It only happens when the power cable's pulled out. In the past I've known bios clocks reset when the power was pulled, but not when the power cable's left in which is what's led me to think it could be battery. Will try and find a spare battery.

Does sound like a battery problem then. Post how it turns out.

Cr416 · 24 Mar 2011 at 16:23

Ginger-Menace said:
try a new battery first and see if it helps

Try this first.

macfanuk · 27 Mar 2011 at 22:16

swapped the battery from one pc to this and put the battery from this into the other pc and now neither seem to have the problem...