Changed CMOS battery but can't reboot pc

June 30, 2016 at 09:46:23
Specs: Windows7
Just changed battery but pc wont reboot when switched on. I hear HD and fans but nothing else. Monitor etc work fine have tried on another pc and have taken out ram etc as noticed on a similar post but still no luck.

See More: Changed CMOS battery but cant reboot pc

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June 30, 2016 at 11:53:03
Did you upplug the computer BEFORE changing the CMOS battery? A assume this is a desktop computer.

Do you see anything on the screen when you first turn on the computer?

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June 30, 2016 at 12:22:56

Yes unplugged pc before opening and nothing comes up on the screen.
Yup it's a desktop.

message edited by Jetsetgla

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June 30, 2016 at 13:13:35
Verify the battery is correct number and is not installed upside down.

Check that you didn't jar something loose inside. That is easy to do. Late to advise you but you need to take precautions you don't zap your hardware with a electrostatic discharge. If you have an ON/OFF switch on your power supply then leave the power cord plugged in but shut off the switch. That way you have a built-in ground. Simply touch the case to discharge any static on your body.

Re-seat all the cards, memory and cables. Only do one at a time.

Di you disconnect any wiring from the computer before opening up? You may have connected the monitor to the wrong port.

message edited by OtheHill

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June 30, 2016 at 13:43:51
Thanks for help. Battery correct one type and inserted correct way up. Was careful really the charge and everything looks in place. Will have a look at repeating cables etc.

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June 30, 2016 at 22:16:56
Was the computer working at all before changing the battery?
If not then why did you change the battery? The PC will work with a dead CMOS battery, it just will not hold the settings if unplugged. CMOS batteries last many more years if the computer is never unplugged.

You have to be a little bit crazy to keep you from going insane.

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