I was using my laptop one day and it randomly stopped displaying video!!
Had to tear the machine down to the motherboard and even take the motherboard out of the chassis to get to the add-in GPU. about 500 screws, some thermal compound, and some dag flabbed, stinkin piece of junkin later, got down to the motherboard and the card, removed it and replaced with an ordered card. put it all back together and PRESTO video!
make sure you have the right tools for the job!