Cmos Battery

[D1607]

Hi Everyone,

I'm new to this forum. I don't know too much about pcs either.
Basically, over the last week, the date/time on my pc [I use windows] has kept adjusting itself to Dec 2001, 23.03. I was told the problem was probably to do with the Cmos battery, so I replaced that yesterday, but despite the new battery, I am still encountering the same problems. On start up, I get the following message:

Warning!! CPU has been changed.

Can anyone help shed any light on what might be going on here?

D

[patio]

Installed properly ? ?



As you can see on most machines it is shiny side down...

[D1607]

Thanks for the reply.
Yeah, installed properly. Initially, seemed to work. Time and date were fine. But has now started adjusting itself again.

[patio]

What type and how old is the power supply in that machine ? ?

Experiencing any other problems such as freezes and restarts ? ?

[D1607]

The pc was built in early 2004. The battery is a CR2032.
The only other problem last few days has been the windows updates not working properly over the last few days.

[Raptor]

Try resetting your BIOS values to default.

Does the Windows clock or the BIOS clock keep setting it self back?

[D1607]

Sorry, I have no idea how to reset the BIOS.
I think it's the windows clock that resets itself.
Sorry to be so vague.

[patio]

What power supply is in that machine and what wattage is it rated at ? ?

You can reset the BIOS by leaving that battery out for ten minutes or so

[D1607]

Hi,
I don't know what wattage the pc is. Sorry if that sounds dumb. If someone out there can illuminate me on thatm be appreciated.
I have reset the date and time on the BIOS, but it keeps resetting itself.
Even though I shut the pc down properly, on start up, I get the following message and have to reset time and date once more:

"The system was not correctly shut down and is now working in safe mode speed. Press 'Del' to BIOS set up table to get correct CPU speed."

Does anyone know what might be going on?

Thanks

[patio]

I would definitely try another fresh CMOS battery because judging by your latest error messages the BIOS is not retaining it's info long enough for the machine to operate properly...

After that find someone who has a working knowledge of replacing components and borrow a known good PSU and swap it in there to see if this is the issue.

[D1607]

Hello again:

I'm still having these problems. Have put a new Cmos battery as I said, time and date still not being retained when I start the PC. Have put a new PSU in as well and still having the same problem. I'm also having to go into the CPU chipset to change the whatever you call it, MHZ, from 100 to 133.

Any one got any ideas?

[Computer Hope Admin]

If the computer is still unable to keep the settings after replacing the CMOS battery. I'd make sure first you're using the correct battery, hopefully you kept your older battery and can verify or have documentation that states what the battery specifications should be.

If the correct battery is being used I'd assume that the new battery is no good or was damaged when put in. As Patio suggested try another battery in the computer and be aware of ESD while you're in the computer.

If another battery does not resolve the issue I'd have to assume something with your motherboard, e.g. the connector used to hold the battery in place is bad. Patio also suggested a new power supply (PSU) it's always a possibility however if the computer is powering fine just not storing the settings I'd first assume the motherboard before the PSU. However, it would be easier to replace a PSU first before a new motherboard.

ESD:
http://www.computerhope.com/esd.htm