I was using my PC when it suddenly lost power (there wasn't an outage or anything) and now it won't turn on again. The first time I tried to turn it back on, the power button lit up for a second and nothing else - subsequent attempts did absolutely nothing. Also, maybe a minute after that, the PC made what sounded like a brief sparking sound so I've now disconnected it from the mains to be safe. Please advise!
Update: fixed. Still not sure what the issue was, I opened it up to test the power supply and the button. Couldn't find any problem with either of them but it's suddenly working again for whatever reason.