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Repair guides and troubleshooting for the HP Compaq DC7500, a business class desktop computer introduced in 2007.

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Battery seems to need replacing

The HP Contact (desktop) needs to be replaced and it is unexpectedly difficult to access

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I'm assuming you are having difficulty PSYCHICALLY accessing the device and replacing the CMOS battery?

This video shows how to remove the top, I think there are screws at the top, back that need to be removed first.

I'll add that a symptom of a dead cmos battery is a constant need to input time and date on start-up, is that correct for your device?

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Find your parts and then open it like here.

Maybe you will need to do some soldering.

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