hello everybody! am new here. i have 2 x31 thinkpads with same problem. power is ok but it wont boot. But if i press the back of it ( where the memory card is) it boots up and proceeds to windows but for a few minutes only.....it shutsdown! powering it again it no longer boot but doing same thing above it boots. i have it diagnosed by a repair technician he said video controller is the defect but i doubt it! Also i cant hear nor feel the fan working by having cigar smoke near its air vents. the model is x31 2672bla. i contacted ibm parts and service the system board cost 30K in philippine money. Its like buying a new laptop. thanks in advance guys i really need help!!!