I posted this in H/A as well, because I have data on my computer that I need quickly, and I don't feel like trying to extract the hard drive:
So I turned on my computer yesterday, it started to boot up, and then after maybe 10 seconds, it completely shut itself down. After that, hitting the power switch did nothing - it wouldn't even try. If I power down with the master switch and then turn it back on, it will perform another attempt, but usually it doesn't even last long enough to get the fans spinning - it just craps out.
There's some power getting to the mobo, at least, because the light indicating that it's getting power is on, as well as the post code indicators (which give codes either for "boot attempt" or "save all data in stack back to CMOS" after each boot attempt). Also, after an attempt, there's a very faint beeping, that you have to stick your head into the case to actually hear.
So... what's up? I've pretty much exhausted my store of troubleshooting prowess. Is my mobo dead? Power supply failing? Gremlins?
I submitted an entry to Lego Ideas, and if 10,000 people support me, it'll be turned into an actual Lego set!If you'd like to see and support my submission,
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If that doesnt work, swap out every major component one by one. It sounds almost definetly to be a hardware problem.
If you dont have swapsies for all the components, remove the HDD and go to a PC repair shop and ask if you can access it if you need the data badly.