T500 making annoying sound related to screen activity

My new T500 (model 2082-9HG) apparently causes a strange cricket-like high-pitched computer-sound everytime something changes on the screen. It's pretty loud and chirpy at times. Seems to come from somewhere under the [Insert] button or maybe even from the right-channel speaker but I did not trace it with a directional microphone yet.
I was wondering if this is normal, and if and how it can be eliminated. I'm prepared to open the T500 myself, if that is what is required. I'm not prepared to send it away for this, because I don't expect Lenovo to 'solve' this, since it seems hardware-related. They probably used cheap parts or bad shielding somewhere in the T500 and I doubt they will admit to such fault in their design.
I've 'denoised' ans silenced strange noisy computer-electronics before, using foam and kit and glue and such things, but perhaps a manual for this particular noise-source already exists. Can't imagine being the only or first one with this complaint.
Any and all info on this highly appreciated.
Thanks in advance!

I don't have that issue so I can't hear it at all. Of course mines a 2081-CTO from last year, which could explain why. The only time my system beeps is in a BIOS, doing something wrong, when the power is low or when I'm connecting my power cable to it.
Odds are, IT IS cheap parts that's causing the problem.
T500 2081 CTO ~ T9600 2.8GHz ~ WXP Pro 32bit ~ WSXGA+ 15.4 LED ~ATI 3650 ~ 4GB DDR3 RAM ~ 500GB WD 7200rpm
Camera ~ AT&T WWAN ~ CD/DVD Combo Drive ~ Intel WiFi 5300 AGN

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T500 making annoying sound related to screen activity

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