Digital PC350

Hi All, Ok as Tony said this is Digital Professional workstation. The sceen lights with small square and I can see horizontal traces, I guess fly back. Sorry It is not the vertical scan. When I got it started fine with some os (I have not seen PDP before) with five or six menus on it. It was so dusty, I clean the dust and now it starts with blank dispay (with horizontal fly back lines) But if I hit keys, I could hear beeps so I guess system works fine. I just broke the display part or cable. This is what I see. Monitor - VR201 - with 15pin male connector and RJ-11 connector for the key board. Red lights on the back 1 & 2 ON. Geen light "DC" on. on the card slots right to left 1--empty 2--empty 3--000034 4--001002 5--002004-may be floppy disk controller 6--000401-cpu and hard drive controller Thank you in advance for your thoughts Anil