CMOS always resets!?

j0nnyd

j0nnyd

j0nnyd

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Joined
1 Apr 2007
Posts
72
Hi,

My cmos is restting quite frequently. I was slowly overclocking and got up to a stable 3.1ghz or so. then for some reason, when i was using the pc as normal (i.e. not straight after a bios change) i for a message saying the cmos settings failed, date and time not set...or something similiar, press f1 to setup - whereby it goes into the bios and every setting has reset.

After i reset the settings i booted up as default, no overclock. Then it happened again a couple of days later randomly. Any one have any ideas? I have moved the pc around during, taking the power cord out and swticihing the power supply button off - but it should affect it should it?

There has been one occasion where i had to reset the cmos completely, take the battery out, change the jumpers due to an over easger overclock! - any affect?

Thanks!

Ive recently had a troubled installation of vista etc, but this shouldnt affect it?
 
yeah i think so!

If i didnt though, it would happen every time i turn off and turn on wouldnt it?

This seems to only happen when i cut any power to the power supply. I.e. either turn off the switch on the power supply or turn off the power at the wall socket.

any ideaS?
 
the 1 thing that you don't list in your sig is your mobo - which is it?
some abit BIOS do this (apparently as a fail safe to recover in the event of a crashed overclock) but why are you turning off the PSU switch or at the wall?
 
When you took the battery out are you sure you put it back in the right way?

It's either that or a duff battery. Take the battery out and measure it's voltage.
 
BUFF said:
the 1 thing that you don't list in your sig is your mobo - which is it?
some abit BIOS do this (apparently as a fail safe to recover in the event of a crashed overclock) but why are you turning off the PSU switch or at the wall?
Click to expand...

I always turn things off at the mains if they are not being used, isn't that what everybody else does?
 
surely there is only one way to put the battery back into the motherboard!?

Whats the button cell??

As for measuring the voltage, i dont have any tools to do that.

It must be something to do with when i had to take the battery out, cause it only started happening since then and it definetly only happens when i either turn the wall socket off or remove the power cable from the PSU.

.... do you agree?

What can i do to solve it if this is the case, is there any special way to put the battery back etc?

My mobo is listed - its an asus p5b

thanks for your time again guys
 
i'm not clear have you tried a new battery, the mobo will still have power when the pc is shut down, some have power leds on the mobo so will keep their setting with no battery power until the wall switch is flicked to off or unpluged.
 
From what you have stated it seems clear that either you have a dead battery, or that it is not properly seated.

Replacement batteries are inexpensive and widely available, when you put it in try to avoid touching it too much as the secretions from your skin will etch the surface of the battery and may prevent it from making a good contact.
 
Agreed with above POST, the symptoms described are definetly one of either a flat or incorrectly inserted battery, make sure the + side is on top and yes you can insert it the wrong way.
 
Sorry for my low knowledge but i take it, the mobo battery is only for keeping the mobo settings intact?

Basically, im at uni and when i go home i tend to turn everything off at the wall. When i come back after the weekends, i switch all the plugs back on and have to reset the cmos settings.

however im not having any problems with the pc once ive done this. But is this doing any damage?

I dont quite understand why the cmos keeps all its settings when i leave the main switch on - surely it wouldnt even do this if the battery was dead?
 
The battery is only responsible for maintaining the CMOS settings.

When you shut down your PC there is still power to the MOBO which is interrrupted only when you either flick the switch on the PSU or at the wall.

You are not doing any damage to the PC - but my patience would not take kindly to the situation.

Check that the battery is properly seated with the " + " side showing - if the CMOS resets again then invest the couple of quid for a new one.
 
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