Having problems with HP pavilion computer series dv6. At first it was turning on but just for a second in less than a minute while booting it will then turn off and take hours for it to turn back on. I took it apart to see if it would turn on just with the basics (motherboard, Lcd, 1ram, power button, fan and dc power board). The power board seemed fine despite the ash like substance that cover it or so I assume since the light goes on. I went ahead and put it back together however now is off for good there is no signs of power being supplied. I read in other threads that this series in specific was problematic due to the Nvidia GPU. Now i am thinking either is the GPU or the motherboard is dead (which seems unlikely since it turned on before). Any thoughts in why this computer is not turning on? And is there anyway of figuring out whether if is indeed the mobo or the GPU?