Hi there,
I have the same problem with my M45-S292 for past 10 days. I tried everything and it is sad that it seems nothing works according to the link you posted. Anyway, when I formatted my laptop it worked fine. I started with XP SP3 and then it was fine, Intel chipsets, it was fine. Then I installed graphic card and windows updates and it rebooted with that 3/4 screen so I thought it could be the graphic card. I uninstalled it and it was fine again!! I even reinstall the graphics (Intel 915) and it was fine still! Then I installed the rest of the updates and Zonealarm and it had problem so again uninstall and install graphics and it worked. I even used it for a day with firefox and web browsing and it was totally fine. So the only things on my laptop were an up to date XP SP3, up-to-date BIOS, drivers (No Toshiba softwares like Common module, power or anything),Winrar, Zonealarm, Firefox and IE 8, wmp 11, vlc media player, and flash player and everything was fine!
So I started by installing these softwares Nero, Winamp, Real Player, Jet Audio, and Babylon and BAM it got the problem and now uninstalling the graphic card does not help anymore! :-(
I may try to play with the WiFi and see if there is a conflict between them, and also uninstalling these recent softwares but the problem is really wired because when it has to be cooled down or wait it means there is a hardware problem that, and by the time of the post in your link I can say that it is not due to a recent update and it is a hardware failure for sure. But the fact that uninstalling the graphic card helps shows that it is a software conflict too!!!
Please keep me posted if you had anything new or found something about the issue
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Update : Ok, the wireless adapter uninstall/install did not help but when I uninstalled Nero 8 it was OK and then I reinstalled it and I had the problem again! I do not know what these drivers or software change that causes this hardware problem!!
K1