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Computer won't start up and has a constant tone.

When I turn on the computer (ACER Aspire AST690 UP925A) the fans come on and the DVD drive light blinks for about 1/2 second. Then everything goes off for about a second. Then the fans & drive light come back on for a second, then a constant tone starts. The fans keep running, but the drive light stops blinking. Nothing else happens. Nothing shows on the monitor. I've tried uplugging the hard drive power and data connections, but it doesn't change anything, so I'm thinking it's not the hard drive. I've cleaned the fans and vacumed out all the dust I could get. I can't quite tell where the sound is coming from though. Any suggestions?

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  • djwadd Apr 13, 2009

    Thanks, the post was helpful, but unfortunatly it looks like I'll have to take it in to a repair shop.

  • unhappywacer May 11, 2009

    I have the same problem with my Acer Aspire AST690. It won't startup and there is a constant tone--a very loud high pitched noise. Did you ever get yours fixed?

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  • 34 Answers

If the noise is constant then it means the problem is either:

1: a Power supply issue
2: a motherboard issue
3: a keyboard problem

the latter of the three being the easiest to fix, try booting with your keyboard unplugged or even better if you have another keyboard try using it to see if that corrects the problem.

If the above does not work then you have a problem with 1 or 2, and in order to find out for certain you will need to test it, you can goto your local computer diagnostic store to see if they can check which it is.

and hope its not a problem with the motherboard.

Hope this helps, and Good Luck

Posted on Apr 13, 2009

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