Loose screw in monitor

I was working with very tiny screws in a external hard drive enclosure, 
and without going into the embarassment of HOW, I lost one of the screws 
through the vents in the back of a CRT monitor.  After much screaming 
and swearing, I have accepted that the screw is lost unless I take to a 
monitor tech, but should I not use the monitor, knowing there's a 
foreign screw in there that could potentially short something out?

Dave