Solve : computer shut down, will not turn back on?

1.	Solve : computer shut down, will not turn back on?
Answer» Hello, any good starting points for troubleshooting what may be wrong? I have an HP desktop that my daughter was in the middle of using (searching the WEB), when it just POWERED off. everything ELSE, the monitor, printer, ect. stayed on and now it will not turn on at all, no fan starting, no blinking, no noise, nothing. Thanks for any suggestions or if you need further info, LET me know!At the least it sounds like the power SUPPLY has died. If you're lucky, that's all. Are you comfortable working on it? How old is the machine? Hopefully it's still uinder warranty.

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