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Noisy HP Desktop.

by summerray / March 27, 2008 2:35 PM PDT

My 3-month old desktop has developed an intermittent low volume high pitched buzzing noise that is driving me crazy. Sounds a bit like Morse code except there are very few breaks. First noticed it a week ago and since then it comes and goes, usually lasting for only a few minutes with some 1 or 2 second breaks, but today it's been going for the last 3 hours, still with the breaks. No new hardware/software added recently.
The model is an HP Media Center M8200N with 3GB RAM, 3GHz CPU.
Has anyone else experienced this or can suggest a cause/remedy?
HP Online Support suggested a faulty fan but it's not a noise I would associate with a fan, and the computer case is cool to the touch.
Would appreciate any advice.

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by Willy / March 27, 2008 11:21 PM PDT
In reply to: Noisy HP Desktop.

With any noise, just follow your ear. While a fan can be the noisy source, many times a dirty fan which becomes unbalanced is noisy and after a minor cleaning is OK. Also, the fan noise can come and go plus there are more than one fan in any typical system, check the power supply. Last on fans, when dirty cpu fan its possible that higher rpm operation is present as the dirty HSF(heatsink) isn't efficient and to cool the fan runs higher pitched, etc. Blow the system case and brush down as well. The other source of noise is "resonance" of metal-to-metal contact or plastic to everything in the system. A minor rap/tap helps detect the source to include covers. To determine noise source, remove side cover and detect away.

tada -----Willy Happy

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Noisy HP Desktop.
by summerray / March 28, 2008 12:37 AM PDT
In reply to: Locate

Thanks Willy. Will give it a go later today and let you know results. Will be surprised if dirt is the cause though as unit is only 3 months old and is in a relatively clean environment. No noise this morning so far after being turned off overnight.

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Noisy HP Desktop.
by summerray / April 3, 2008 2:15 AM PDT
In reply to: Noisy HP Desktop.

The noise has not yet returned. Go figure!

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(NT) Good, but if it does, you got some clues/tips
by Willy / April 3, 2008 10:45 PM PDT
In reply to: Noisy HP Desktop.
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It's still under warranty take it back.
by Dango517 / April 3, 2008 10:55 PM PDT
In reply to: Noisy HP Desktop.

If you open the tower you could void the Warranty. See your paper work that came with the PC.

This thread untracked.

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Noisy HP Desktop - Sequel.
by summerray / April 12, 2008 3:23 AM PDT

Hard drive crashed on April 7 and was not recoverable. Fortunately I had made a back-up two days before.
Was burning a 4Gig DVD at the time and the high pitched whine had returned. Operation self aborted and on reboot got a message that hard drive failure was imminent, subsequently died before I could make another back-up. Desktop icons faded and then disappeared, followed by black screen with message telling me to install boot disk.
Hard drive being replaced under warranty.

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