ATI RADEON 9550 Graphic Card "controller monitor initializing failed" Questions

lines running down screen - have tried different monitors and same problem - have changed ram over and problem persists - am thinking it either display driver or graphics card If you have not made any

...Controller to PCI standard PCI-to-PCI bridge modified the Monitor type to VGA 1024 x 768. and also use the MOD radeon OMEGA drivers but all failed to works on it. i'm still looking forward the best ...