Can you provide more information?
Like what side of the cable you were wiggling (PC or Monitor)?
Do you have any tight bends in the cable?
Is there a problem with your computer's VGA connection?
I've got a Xenarc 750TSV and now that I've finally installed it in the car, I'm having issues with the signal. The PC boots and the monitor does nothing. If I wiggle the VGA cable a bit the monitor will eventually turn on and everything is fine. Once I shut the car off and start it again, the signal isn't found. I'm hoping the issue is just the VGA cable and not the lcd itself.
I even tried powering the screen using the standard plug instead of the car and the problem persists.
The real issue is that once I put the car back together, I can't get at the cable to wiggle it or unplug/replug it?
Anyone else seen this before?