I was working on an old PC and it was functioning fine, but I encountered some BIOS-related problems. So, I powered it down, held the power button, and turned off the PSU. I carefully took out the CMOS battery and waited about five minutes before putting it back in, ensuring it was the right way round. Now, my PC is completely unresponsive—no lights, sounds, or fan activity. I've double-checked that everything is seated properly, but after extensive troubleshooting, there's still no change. Can removing the CMOS battery cause this kind of issue?
5 Answers
Did you remember to turn the PSU back on after you removed the battery? It can be easy to overlook that during the troubleshooting!
Have you thought about taking your dead PC to a professional repair shop? It sounds like you’ve tried a lot, and they might spot something you missed!
Make sure the battery connectors are securely connected to the motherboard. Over time, they can get loose due to heat or pressure. If they're not making proper contact, that could explain the lack of power.
Typically, a motherboard should still function without a battery or with a dead one; it just won’t keep track of time. Double-check the front panel connectors—sometimes they can get loose during handling.
If the battery is dead, it should still at least boot to BIOS or show an error message. Also, ensure the power cable is fully connected to both the power supply and the motherboard.
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