Ok here goes, Just bought a ESC PT800CE-A, Intel Pen 4 3GHz processor, Kingston KVR333/512R ram, Radeon 7500 (Excallibur w/64mb) 3D video card and Seagate 120G harddrive. I had a ATX case from an older computer and wanted to install these new components. The issue is when I power it up I hear the harddrive start up and the fans working, but no signal (output) to the monitor. The monitor stays in Idle mode (amber light). So, I tried the old video card that I know works and nothing. I verified the jumpers and even tried to clear the CMOS, But no luck. Any suggestions? Thanks for the space Techspot!!