there go $160 video card. CRASH AND BURN. this time it cant overheat. i think what happen and this just a big guess. my 750w power box mess up my video card. so i put in 400w. take me little bite longer just to find out my problem. after i pull out my card. my pc start to start up right. so i got get new video card and power box. i was going get a new tablet. going take longer for me get back to art... it will cost me about $270.00. :(