Since I don't own this keyboard I may have to call it a day soon.
I tried removing the MIDI board and burning the 3 EPROMs from
http://www.lazyblueoctopus.com/html/oberheim.html. Still no go.
Some LEDs stay lit, some are flickering, most are off and the
buttons do nothing. Curiously the LEDs and buttons on the Bender
panel have always worked. However it appears the problem is not
the EPROMs. So I'm back to my original request: Diagnostic EPROM.
I'll keep the keyboard for another week, then return to customer.
Thank you to everyone for the suggestions. The one about a stuck
button was a good one, I've seen it before. But not this time.

Doug





1a. Re: OB-Xa Diagnostic EPROM needed
Posted by: "synthparts" synthparts@... synthparts
Date: Mon Dec 3, 2012 1:58 am ((PST))

Those B5 ROMs are for the OB-8 not OB-Xa. Anyway I have the ROMs for the
OB-Xa with JL Cooper MIDI and Rev C processor board if you need it.

Doug
synthparts.com