Hi Michele,
Welcome to the forum.
Is the video issue limited to the primary computer, or is also a problem with the Total Recall?
Did you re-seat both the video distribution card, and the Keyboard/VDU card?
At a guess, your issue is on the Keyboard/VDU card. Check the 34 way ribbon cable that goes from the main Keyboard/VDU card, to the VDU card. It is folded 90° and can get damaged.
There is also a coax cable coming from that board which may have come loose.
Anthony.