removing thermal compound
i recently bought a pc on ebay and when it arrived. the heatsink off the cpu came off and it left some of the thermal compound on the back of the video card. at firist, i didnt notice the thermal compound and tried to boot it. didnt get any error beep, but the video just show a white screen then other color with verical lines runing thorugh them. when i relize that there was compound on the video card, i tried cleaning it with 91% isopropyl alcohol, but its still showing the same error. im guess theres a small amount left where the chip is attached to the board. well else can i do?