Add me to this list of Toshiba owners, I have a M200-P434.
Bought it in february 2008, its been working all fine and dandy right up until the last few days, when it overheated excessively.
Using speedfan to check the internal temperatures, my hard disk was around 56celcius (which i gather is quite high), and my both ACPI temperatures were about 70 to 85 degrees. Core temps were between 43-45celcius. This was a few days back
10 minutes later it shutdown, and I was quite worried, but after it cooled down I was able to turn it on just fine, but since that episode, my temperature is on the high side.
I do not have an aircon where i use this laptop, but I have a Notepal cooler which i put underneath it, and also an external fan to take out air from teh vent, and sometimes I use this fan to blow air underneath the laptop. This has kept it "cool" for the last 6 months, except the last few days, where it just went ballistic.
any ideas? (im thinkin it could be dust, clogged heatsink..)
It's either your notebook fan has busted or there is alot of dust in your computer restricting airflow. Take it back to the service center and ask them to clean it for you.