PC won't turn LED is lit.

By bochnak
Mar 31, 2006
  1. My PC just turned off while I was on it as if the power was pulled. The green light is on, but hitting the power switch doesn't do anything. PSU, mobo, switch as possible failure?

    New to the site, thanks in advance,
  2. howard_hopkinso

    howard_hopkinso TS Rookie Posts: 24,177   +19

    Hello and welcome to Techspot.

    It`s either the psu, or the mobo that`s fried.

    The only way to tell, is to try another psu first.

    Regards Howard :wave: :wave:
  3. bochnak

    bochnak TS Rookie Topic Starter

    Thanks for the quick response. Is there any way to test these components or is swapping all that you can do?
  4. howard_hopkinso

    howard_hopkinso TS Rookie Posts: 24,177   +19

    Well you can test the psu with a psu tester. They don`t cost that much to buy.

    HERE`s a couple of examples.

    Another way is to pull out you psu`s mobo connector and short the green and any black wire together with a paperclip etc. If the psu fan spins, you will know that at least your psu is working to some degree. However, this is not foolproof.

    Look HERE for how to do this.

    Regards Howard :)
  5. bochnak

    bochnak TS Rookie Topic Starter

    Thanks, Howard. I'll prolly just order up a new PSU and see what happens. I appreciate you welcoming to the site and your help as well.

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