I reach for my Ubuntu LiveCD so I can boot that (we're not installing it) and test if the machine seems ok with a LiveCD.
What I do next depends on the test results.
After repairs, this Toshiba Satellite Pro 6100 worked fine for months. I took it on a trip in my carry-on luggage and the video display has gone bonkers. The resolution is stuck on 640x480, but worse than that is the flickering and the stripes.
The OS is XP Pro SP-2.
I have searched the web for troubleshooting ideas or possible solutions. One possibility was that the video card connection is loose.
The control panel says the video card is operating normally.
Can you point me in the right direction?