High pitched continuous sound from Thinkpad X61 after recovering from hibernation


Have this nagging issue for quite a while :
when my Thinkpad X61 laptop (on Win XP Professional SP3) wakes up from
hibernation, it would give a continuous "eeeeeeeeee" high-pitched sound.

How can this be disabled ?
sunhuxAsked:
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x3manCommented:
Have you tried looking at the settings for microphone volume? If this is set too high it can produce a high pitched interference sound.
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rnicolausCommented:
That could be a squeal from a capacitor.
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sunhuxAuthor Commented:

But this does not happen if the Thinkpad does not get into hibernating mode & wakes
up from there.

I've heard my colleague has something similar but the sound is much much softer
& it's not that tone
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sunhuxAuthor Commented:

I've check this (microphone) too : it's at something like 10% of the max volume
for speakers & microphone

Just found that "Sound recording" was at max : hv reduced this : will test it out tonight
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nobusCommented:
disable the sound to test if it comes from speakers or not.
it can be a sound from disk, fans, or even transformers - i never heard of a squealing capacitor though
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sunhuxAuthor Commented:
accepted
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