I've got a DeWalt DW623 sander that's stopped working and I'm trying
to pin down the problem. I took it apart and sprayed it out and when
I have the top cover unscrewed and I plug it in, it turns on fine.
Screw the top housing down and it no longer turns on. It's always
been a little twitchy, you'd push the switch and it would take a few
seconds for it to come on, or you'd have to toggle it back and forth a
couple times.

I looked at the wiring and nothing seems to be loose but that's as far
as I've gone so far, I haven't actually tested the wiring. Does
DeWalt have a place to order replacement parts or should I just hit
Radio Shack for a replacement switch?

Any ideas welcome, thanks.