PC booted by itself after a spark from electrical socket.

Gyustarr

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Sep 11, 2014
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Greetings.Today, I had to plug my pc into a wall socket instead of a power strip (or multiplug I'm not sure about it's english name) and after a spark my PC booted by itself, and displayed a bad bios checksum message. After I selected the default option, the pc booted, somewhat slower than usual, the date was reset all the way to 2010, and it couldn't detect some of my devices. After rebooting my pc I reconfigured the date in my bios, and every device seems to be working in order with no performance issue.
Why did this happen however? I had to plug my pc in the wall socket on multiple occasions throughout the years and I never encountered such an issue.
 

Gyustarr

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Sep 11, 2014
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18,710


I have powered it off a few times and the date remained ok. I'm thinking faulty CMOS battery as well, but I'm more concerned with why the pc booted when I plugged it to the wall socket. I'd hate to suspect the psu as well.
 
Gyustarr said >> "I'm thinking faulty CMOS battery as well"

CMOS batteries don't become "faulty", they simply become depleted/used up after some time, just like any other battery. It's a normal process, not a fault.

As for the PSU, if you've any suspicions about it you should replace it, but not with a cheap one.
 

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