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Repair guides and troubleshooting for the HP ProBook 4440s. Featuring a 14" screen and Windows 7 operating system, the ProBook 4440s can be identified by model number C6Z33UT.

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How do I disconnect my CMOS battery

How do I disconnect my CMOS battery so I can reset my BIOS Password?

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1 Antwort

Usually in laptops, they won't have a little socket for the CMOS battery like a normal desktop motherboard would. Instead they tend to have them plug into the board using a little cable and then stick it to the case somewhere with some glue. It'll look like a little round guy wrapped in black tape with 2 small wires coming out that plug in somewhere on the motherboard.

Sometimes they can be soldered on as well; which definitely messes up your plans. Its equally possible it does have a little socket similar to a desktop in which case, depending on its location, you might have to take out the entire motherboard to access it. Its hard to say exactly what you'd have to do.

On some models you can just take off one of the bottom covers and it will be right there, on others you have to go pretty deep into the system to find it.

Luckily HP has really amazing documentation for their stuff, so here's the maintenance and service manual that can show you how to disassemble the laptop: http://www.hp.com/ctg/Manual/c01905586.p...

HP usually refers to the CMOS battery as an RTC Battery (Real Time Clock) in their documentation. You can search the document for that and it'll show you just how to do it. (Extra Pro Tip: Check page 97 :P)

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A class mate and I decided to start taking it all apart yesterday in Lab, because it was nearly impossible for us to squeeze the piece into the socket since it was turned away from the opening. I'll take a look at the links that you included in your answer, considering it's vitally important to my grade that I access my BIOS in order to enable virtualization. Thank you!!!!

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Lindsey Wappelhorst wird auf ewig dankbar sein.
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