hi, i just bought a pc off ebay and when i first start it it's suppose to come up with a set-up to enable the motherboard and everything. when i load it it say's cmos/gpnv checksum bad or ps/2 keyboard connected incorrectly but i know my keyboard works!
thankz in advance
Stu......

A checksum error is normally caused by the motherbard battery dying or dead. They are very `usually' inexpensive and not very difficult to replace.

wait i got instuctions to my pc (well the mainboard) and i think i have to install it myself cus its talkin, about installing the processer and the cpu and memory modules ect should i try doing this first befor buying a new battery???

Ummmm...... how does that make sense? If the Processor or RAM is not installed.... then NOTHING will happen. You wont even see errors.

Even if.....

You have everything in working order, except NO RAM, you will see a black screen, and in most cases, the Tower will continue to beep.

So apparently..... these things ARE installed.

It would help to know how old this PC is.
There is somewhat doubt in my mind that the CMOS battery is dying or is dead.
Although it might be.

The actual procedure for clearing the CMOS is fairly straightforward. The first thing to do is power off the computer and unplug it. Let the comp rest for about 30 seconds. Now, you need to find the reset jumper on the motherboard. This jumper is moved from the non-reset to reset position for a brief moment and returned back to the original position. Plug the power cord back in and reboot the computer. At this point, it should boot with the BIOS defaults allowing the settings to be redone.

Also, if resetting the CMOS Jumper didnt do it.

Quoting TheWooMan

"wait i got instuctions to my pc (well the mainboard)" Ok so this is good.

Except, what I say in this post, SHALL be done BEFORE what I say to be done in my previous post.

[List]
1. Clear BIOS password
2. Reset the BIOS!

So First what we do is.
[1] Clear the BIOS password.
To do this, Power off your comp
[2] Take the cover off.
[3] Take out the CMOS battery
[4] Boot up your comp And wait for 10min.
[5] Press the Reboot button, and wait for another 10 min, because sometimes the first time doesnt do it.
[6] Turn off the comp.
[7] Put the CMOS battery back in.
[8] Read my previous post and do what that says, which Resets the BIOS.
[9] Enter the BIOS Setup by continuously tapping the F2 Button a sec after you push the power button. Once your in the BIOS set everything back to what it was.
[10] Save Changes and Exit

______-SamZee-_______