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Computer Hi, I built my own computer 5 years ago and it's been absolutely reliable until just the last 3 days. I leave my computer run almost 24/7. Two nights ago, in the middle of the night, I was woke up by this awful, high-pitched whine. When I figured out it was coming from my computer, I ran over and hit the power switch, which did nothing. The monitor was already off from a power-down setting, so nothing was happening there, but it was still whining. I had to reach to the back of the tower and switch off the manual power switch to stop the whine. I went back to bed, got up the next morning, powered it up and it was fine the next day and all day yesterday until last night when the same thing happened. Only, this time, I was using it. The high-pitched started up and the entire machine just shut off. Immediately. I waited about 5 minutes and turned it back on so that I could check temperatures of the motherboard and CPU and they were in the medium to high range but not over my automatic "shut off" setting. Any ideas? Thanks.

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  • Teresa Clark Mar 31, 2008's so far. I unplugged my wireless network and the PC ran great with no problems for almost 2 days. But, then again, while I was working, it started the constant LOUD high-pitched whine and then shut off all by itself. So, I swapped out the power supply and it ran now for about 30 hours. In the middle of the night, it woke me up screaming but instead of automatically shutting off, I had to manually shut it off. The old power supply had a manual "off" toggle switch on the back of it and when I would shut that off, the mother board made a sound that I really can't describe other than it sounding like someone let the air out of it, or a release of some kind, but it wasn't an "air" sound, it was more like a squeak. Sorry, I can't be more specific then that. With THIS power supply, there is no toggle switch on the back of it. When I went to turn the PC back on this morning by the power switch, it wouldn't turn on. Nothing. So, I unplugged it, it made that same "squeak" sound, I plugged it back in, and I could turn it on. It's now ran for 5 hours. The PC fan now is new, so it's not that. The fans inside my computer have been checked and my computer runs with the case open, so I'm watching them as I write this, they are running smoothly. This happens whether or not I have a bunch of programs running or only a few. I've checked the temperature, it's not high enough to shut it down. Could this be a motherboard giving out? It's 5 to 6 years old now. Thanks for all your input, everyone.

  • Teresa Clark Mar 31, 2008

    I looked at each capacitor with a flashlight and not one of them is bulging. I've seen that before on someone else's computer so I knew what you were talking about and knew what I was looking for and nope, not one. They all look just like they did the first day I built the PC. Thanks.

  • Teresa Clark Apr 01, 2008

    It's a Soyo KT400 Dragon Ultra Board with VIA KT400+VT8235 chipset.

    I found someone last night that was unusual. When looking at my device manager, the drivers for the RAID controller were missing. These drivers were there before and I pulled out the installation CD and restored them. So far, so good. Could this have anything to do with it? I don't fully understand "RAID" so I'm not sure if this could have contributed to my problem or not.

    Thanks so much for your help. Sorry that I didn't give you the MB name and model sooner.

  • Teresa Clark Apr 03, 2008

    Ever since I reinstalled the drivers for the RAID controller, it hasn't woke me up in the middle of the night and it hasn't shut down. So, evidently, it's the motherboard then, correct? Now I just need to determine whether it's the Biopsies, or hardware, but still the motherboard? I guess maybe I should just order a new motherboard and plan on replacing it soon. Very soon, eh? Thanks so much for all of your help, everyone.

  • Teresa Clark Apr 03, 2008

    The BIOS!! not biopsies... LOL.. Sorry. I forgot to shut off my keyboard shorthand.

  • Marty marty May 11, 2010

    sounds like the power supply is starting to kick out...



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Look at the capacitors on the motherboard. These are cylinders scattered all over the place. The tops should be flat. I would suspect that some of them are now bulged up. This means that the main power lines are not being filtered correctly. Over time this will result in oscillation which is what you hear. These parts can be replaced by anyone with experience with multi-layered Pc boards. Let us know if you still have the problem.

Posted on Mar 31, 2008

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Can think of only three possibilities:
1. CPU fan motor, bearings needs lubrication or replacement;
2. Power Supply fan motor, same as above or any of the other fans;
3. Hard disk spindle motor (though unlikely).

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Mar 24, 2008

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  • Louie  Role
    Louie Role Mar 31, 2008

    Hi again,

    If you are sure that it is not the CPU fan nor the PSU neither any of your other devices (HD, CD etc) then that leaves us only with the motherboard. Some Asus brands have been known to have a twee-dee sound when the motherboard is failing. It is different from the beeping sounds.

  • Louie  Role
    Louie Role Mar 31, 2008

    What is *********** board (brand and model) pls?

  • Louie  Role
    Louie Role Apr 01, 2008

    Hi again,

    Appreciate the postback and the additional information.

    The RAID configuration being there before and suddenly missing (without your intervention) is indicative of your BIOS/CMOS resetting. Perhaps you can try to reset your CMOS/BIOS using the jumper for that purpose. Alternately, you can do a reset by removing the Lithium memory battery for a couple of minutes. Upon initial startup, I would suggest that you just change the day/date/time and select Default Settings, Save and Exit. This is the Fail Safe mode/setting of the motherboard and most advanced features would not be enable. Thereafter you should try the PC again and burn it in to determine if problem will recur. If no, then it is a motherboard (BIOS) problem, if yes then it is a motherboard (hardware) problem.

    Again, the above was based on the presumption that all other components have checked out to be OK.


  • Louie  Role
    Louie Role Apr 03, 2008

    New motherboard would be the best option. However, consider availability of one appropriate for your processor and memory. Glad to be of some assistance and appreciate the rating. Cheers.



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