Toshiba Satellite 2430-201 Online Noise

[habiibak]

My laptop has a continuous high-frequency noise when online.  When I scroll, it goes away, when I stop scrolling, it comes back.

Any ideas out there?  Help!

[query]

Does the problem continue when you connect an external monitor and shut off the display?  If not, it may be you have a display inverter that is going bad, or that the backlight is beginning to fail.

If it continues even with an external monitor, chances are you have a video chip on the mainboard (or a video card if it's got a removeable one) that is beginning to fail (the high pitch is from an oscillation in the chip that should not be there.

[habiibak]

This only seems to happen when it?s being used online (ISDN connection)  and not when offline.   The machine was purchased a month ago here in Germany....  It?s actually my neighbor?s machine (German)... he?s checking right now if it continues when logged on through the normal low-speed telephone connection...

Thanks for the reply, though, and if you have any more ideas... he can?t see, to get in touch with any of the German toshiba support people.