Well I am using asus P5P 800 VM motherboard, 2.53 GHZ intel celeron processor and 1.5 GB ram installed in it. I have bought an used ATI 9600 AGP card and installed it in my system, it was working good but then I have changed my system's processor and installed an used 3.0 GHZ intel processor. Now I am having problems with monitors display. Now it is showing yellow lines. If anyone have the solution please tell me because I am really depressed.