Question Bios settings reset every time PC is powered off

[_TrickyLiquor_]

I recently acquired an Intel D915PBL motherboard for a Windows XP build I'm working on, and every time I power it up, I get a message on the post screen saying "CMOS Checksum Bad". The first thing I did was to replace the battery with a new one; I made sure to peel off the sticker under it but alas that didn't work. Next I tried installing different versions of the mobo's Chipset drivers and Express Bios Drivers, but that failed aswell. Lastly I tried changing the Jumper Block's configuration and reseated the Ram but nothing came out of it. Do you think it's a Mobo issue?
My Specs are:
Mobo: Intel D915PBL
Cpu: Intel Pentium 4 650 HT
Ram: 1GB DDR2 cl4 533mhz
PSU: Gigabyte P450B
GPU: Nvidia Quadro FX 4500

 

[rgd1101]

did you unplug the power when the pc is off?

 

[_TrickyLiquor_]

did you unplug the power when the pc is off?

I switched off both the PSU and my socket, and I waited for the mobo's light to turn off but no, I didn't unplug it.

 

[Zerk2012]

I switched off both the PSU

That is the same as unplugging it.

 

[_TrickyLiquor_]

That is the same as unplugging it.

I know, I just wanted to make myself extra clear. I really don't think the motherboard's received any kind of serious, if any static damage that would've caused the CMOS holder to bust.

 

[rgd1101]

sound like the battery is not working. could try another battery or keep it plug in

 

[_TrickyLiquor_]

sound like the battery is not working. could try another battery or keep it plug in

I'd keep it plugged but the PC takes up too much space. I already tried using other cmos batteries but that didn't work out either.

 

[_TrickyLiquor_]

So, after leaving the pc unplugged for a day, the cmos started working. I guess it needed to discharge? Thanks everyone.