I have and HP pavilion a420n and when i play 3d games on it the monitor goes into power saving mode and you cant get out of it unless you turn of the computer. It has an AMD Athlon XP 3000+ (2.16 GHz) processor, 1.50 GB of RAM, a ATI Radeon 9550 / X1050 Series graphics card. Please help i really want to play 3d games!!!