hi there, I have a toshiba satellite l350d, amd chipset, 2gb ram,athlon x2, running windows 7. The computer switches on for about 15 secs then clicks off completely, will switch back on as soon as I press the button but just repeats. I have already reseated the processor, replaced the thermal tape on both cpu and gpu to no success. Have checked all connections. I would appreciate any ideas plz.