I am facing very strange problem, some times when i switch on my CPU it does nt turn On, then i use to remove its BIOS cell for 2 minutes and then put it agian back, then i switch on my PC and it gets on and displays following mesage. " CMOS settings wrong CMOS Checksum error Press F1 to run setup Press F2 to load default values " i press F2 and then my computer operates properly. I thought that my motherboard battery is weak and i replaced it with new one but problem is still there, i am very amazed that why it gets on once i remove the battery and again put it back plz help me to resolve my problem my mobo is GA-72X it is athalon mobo also tell me from where i can update BIOS of this mobo i think problem is in BIOS it need to be reflashed. thanks for ur help

A good place to get a BIOS is from the motherboard manufacturer

There's a CMOS configuration problem, that's why pressing F2 works. But the defaults are usually not the optimal values.

Need some clarification: sometimes when you switch on the computer doesn't power-up at all, as in No Electric or response? Dead? Or do you mean that it will not boot past the BIOS? Or do you mean that you don't even see the BIOS screen on the monitor?

Hi, "then i use to remove its BIOS cell for 2 minutes and then put it agian back" Do you mean that you actually unplug the BIOS-chip? I wouldn't do that to often. You'll risk damaging it or the connector for it. I have a mobo that is having the same problem, for over 2 years now, but as I'm using it as a server and never turn it off, it isn't really a problem. The solution I found is similar, but not so risky to damage the hardware. Look in your manual to find the jumper that can be used to clear CMOS-memory. This has the same effect as removing the battery for a while. I never really found a good solution, but my guess is that there's a little problem with the mobo (some short-circuit or a bad conductor...) If you are still under garanty, return the motherboard! Johan

when you remove the bios "cell" or battery, you clear the cmos thats why its says CMOS settings wrong CMOS Checksum error Press F1 to run setup Press F2 to load default values that is normal, but your problem is your motherboard, try checking all power connections( disconnect and connect) and refit all the cards and cables and clean your PC usually that helps with the intermittent power problem, if not replace it

Yes sometimes when i switch on my computer it does nt power on atall i mean nothing is dispalyed on screen. plz help