Monday, sitting at my desk, programing with Rajeev, I powered on my Toshiba. Hallelujah!!! The beeping problem occurred - Rajeev is my witness. Now I have two witnesses, my wife and Rajeev.
I even managed to video the password dialog box behavior: as if a key were stuck. Select all, empty, and it keeps being pressed. (Unfortunately, I just disabled the phone that has the video recorded - now I'm not sure how to transfer the video. Ah, maybe I can switch SIM cards.)
The beeping was at a low frequency - say 2 per second. When I opened windows, such as the password dialog box, the frequency increased - say 4 per second. (These estimates are approximate and relative, not accurate and absolute.)
After beeping for 5 minutes or so - during which I video'ed the effect, and clicked around - eventually it stopped all on its own.
Prior to this episode, the TabletPC had been connected to power but idle and/or in standby for perhaps 4 hours. This is frequently the case: I rarely have the problem when I boot fresh or power on. (Rarely - but I have had it in these circumstances.)
Possible new observation: the problems always start recurring after plugging in to my Toshiba doc. However, once started, they persist, intermittently, even though using my non-dock power supply.
So far NWCS Toshiba support has replaced my keyboard, fan, and motherboard. What's left? Power supply - the frequency shifting according to activity level of PC suggests this could be a problem.
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