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How to replace a compaq presario 1255 cmos battery

It appears that my old laptop needs a new cmos battery. I called Best Buy and they say they have the battery. My question is how do I install it?
Thank you so much!

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Re: how to replace a compaq presario 1255 cmos battery

You have to take the case apart and find the old battery.It sounds like a large tast but you can pull it of in about 20 min.locate all the screws on the underside of the keyboard part of the laptop remove the main battery as ther may be a screw or 2 in the battery case once you are sure that you have removed all of the screws try seperating the 2 parts of the case sometimes they have clips that snap both parts together you can loosen then with a flathead if you find them by pressing inward and releasing them.once you have opened the case locate the battery and replace it .YOU CAN DO IT!

Posted on Nov 17, 2007

Re: how to replace a compaq presario 1255 cmos battery

After you have removed the keyboard and you are facing the processor, the CMOS is located under a small printed circuit board (PCB) to the left of the processor. This small PCB is fixed by two screws that you have to remove and it is also connected to the main board so don't be afraid to pull it up after the 2 screws are removed. The CMOS is a CR1220, 3V.

Posted on Sep 30, 2008

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