Mac pro works fine, minus the display

Ok, so this is a bit of an odd question, I think. When I turn on my computer, I can hear it boot up only the display doesn't work. Blank screen. Cnce it's booted up, if I press the volume button, I can hear it changing volume, if I open itunes, I can hear it playing music, so I know the computer is working, just no picture.
I've ruled out the monitors, as they work fine with other computers. Here's the kicker. If I shut the computer off, open it up, jiggle the video card around a little, and turn it back on it works perfectly fine. Until I shut the computer off again, then we go through the same process. It's an early 2008 mac pro, and I have the 256 MB ati radeon, I think, video card that came with it.
Any ideas? Thanks!

Hi,
It sounds like your Graphics card isn't seated properly.
Remove all cables from Mac Pro, then remove side, earth yourself to avoid static, then remove the graphics card. You might want to clean out any fans on the Graphics card while it's out. Re-insert the graphics card, replace side panel, then reconnect your cables and try starting your system again.
If the same thing happens, it could be either the graphics card having an issue, cable of the monitor not properly inserted or possibly an issue on your logic board.
If re-seating the graphics card doesn't work, contact Apple Tech Support for further assistance.
Hope this helps.

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Mac pro works fine, minus the display

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