I can confirm that flexing on the T40-42 can lead to a total system freeze requiring a hard shutdown. In my case, excessive heat from the DVD drive sent it over the edge. Upon reboot, you are often (but not always) greeted with the long beep, two short beeps sequence indicating a system/LCD failure. Heat and age can cause an intermittent contact to develop between the video card and system board. Small vibrations and/or sudden movements will then crash the system. I imagine most users will declare their laptop as dead and buy a new one. I can't argue with this, but one should realize there are other options, all costing only a fraction of the price of a new laptop. If you're in a pinch and/or want to spend zero money, remove the keyboard using the well marked screws on the back of the laptop. Position a shim of some sort (I used a stack of pennies glued together) to apply constant pressure on the video chip. Then put it back together and when using it, try to be very careful. I was often (but not always) able to run for hours at a time provided I took care to not bump the machine or let it do things that would get it hot. Always fearful of a crash, I was saving my work every couple of minutes. That got tiresome, so I pursued a permanent solution. Not sure what exists in the US, but here in Europe you can send your laptop to firms that will reflow the solder contacts at the video card. I opted to remove the system board myself and send just that in, saving about 50% of the cost. But most people will be more comfortable spending the extra money and sending the complete laptop in (I'd advise removing the hard disk, it's only one screw). This is a well-known problem and I found several companies advertising on ebay. Turnaround for me was about a week. My T42 is as good as new and I figure I paid myself a bunch of money for not just buying my way out of the problem with a new laptop.