Thanks for the advice guys! I will give the DMX a good cleaning. I did notice a few dust bunnies frolicing around inside the board. I am guessing a caig contact cleaning would be in order, for the contacts.
Fret not MichaelW, I didnt lose that many brain cells in the 80's
. I have had the DMX unplugged whenever I am working on it.
I also purchased the service manual for the DMX. I have the schematics and list of part numbers. I also ran the dmx thru the diagnostics setting, to no avail.
My asst thinks it maybe a cap somewhere on the board that both the PS and the power xformer hook up to. As when the board has been unplugged, it works for a few hours, but if I leave it plugged up overnite, the dmx freezes within 15 minutes. I'll be checking that out today too.
I'll post if I get any results, otherwise Ill be scotched up!!