I came home to find my PC dead, and it wouldn't power on. After removing the old 2032 CMOS battery, I held down the power button for 30 seconds, waited about 10 minutes, and installed a new battery. The PC turned on, but I immediately heard a loud electrical crackling noise, so I turned it off right away. Now I'm worried about trying to boot it again.
I tried removing and reinserting the CMOS battery, but when I plugged in the power cable, I noticed a spark coming from the power supply unit. I'm really concerned about what could be wrong and whether it's safe to turn it on again.
5 Answers
You really need to check where the noise is coming from. If you smelled smoke, that's a big red flag. It could be an indication something has gone wrong with the components.
Also, double-check that the new battery is installed the right way. Sometimes it’s the little things that screw everything up!
First off, it’s crucial to open up the PC and see if you can pinpoint where the crackling sound is coming from. Just be ready to unplug it if you see smoke! If it’s crackling, there’s a good chance something might already be damaged. If you’re not comfortable doing this, consider getting a pro to check it out.
Honestly, it sounds like your power supply unit (PSU) might be bad. Thankfully, that's often cheaper to replace than a fried motherboard, but it’s still not ideal.
Using a CMOS battery should really be a last resort. You might end up creating bigger issues down the line, especially if secure boot keys were wiped. A small spark when plugging in is somewhat normal, but the crackling shouldn’t be happening. You might have had a power surge while you were away that caused further damage.
Yeah, I’ve had to swap out several PSUs over the years. They can just give out without warning!