  Absolutely remove the video card as part of your test.
Hey guys! I picked up an old Poweredge 840 couple months ago from a friend and wanted to tinker with it. I had it working with windows server 2008 R2 and played around with it. I then took out the raid card since it kept breaking and reinstalled the OS and it worked fine. I unplugged it and left for a month or so and now when I boots up and posts then it says it needs to enter set-up mode. So I click F2 and it just goes to a black screen. So now I cant boot into windows or get into the bios.  I've tried removing the CMOS battery and checking the sticks of ram and its still does it. I have no clue why its doing this, it was working fine.   Any help would be great! Thanks guys!
Poweredge 840 won't let me access the bios (Black Screen)