Black vertical mark on computer
If it is an LCD monitor it sounds like the monitor got cracked when you moved it. Either that or one of the edge connectors has gotten damaged and is causing a dead column of pixels.
One other possibility is a bad video card or video cable, hook the monitor up to another computer and see if the line is still there, if not, video card or cable. If line is still there then there is either a crack or bad edge connector. Crack there is no fix, except a new monitor. Edge connectors can sometimes be repaired by the appropriate service technician.
Good luck
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