Monitor/CPU in same case, problems?

As I mentioned in a previous post, I bought a Xycom terminal to
integrate as my CNC interface. I gave up on putting a flat panel in
it, just too expensive. So I'll go back to stuffing a 13" SVGA monitor
and electronics into the case. Now, I think I have room to place a
motherboard, floppy, and HD into this case also. What I'm asking about
is, will I run into trouble with the high voltages emitting something
that even -might- interfere with the CPU, HD, etc?
It's no real big deal if I have to have a separate box for the computer,
I just hate to waste all this space...

Thanks,

Jon