Jonesy_55,
I recently had a similar experience, remote display not working, etc., and found that the internal power supply board was bad because of a smoked transistor or regulator, I can't remember which.
We tried two spare units, with two versions of eprom ladder program that we have, and couldn't get *anything* to work. Then I noticed that dip switches on the three units weren't all the same.
Investigating, I found that our two eprom versions of the program for that machine were on different size eproms, 16k and 32k, and that certain dip switches had to match the eprom you plug in.
Once that was sorted out, the machine worked, as well as the display. The tedious part was having to hand load all 60+ parameters through the keypad.
I've found the programming manual (in .doc form) and will send it to you once you provide a destination email.
Botteman