Today i open this laptop check its mother board ,it is physically ok but its "VGA CORE"track is short ,i check many parks on this track like "PQ 800,Q801,PQ802 & many capacitirs like"pc815,pc817,pc843,pc849,pc850" by removing from mother board but short is still there also its vccp, VCCSAP, VCC GFX CORE AXG track also short can any body please help me where which part may be short & please tell me which is its power ic or where from these tracks come