jonnosan wrote:
I found a hairline crack on the PCB that I believe to be the root cause of the problem. It's in the top left hand corner of the photo at http://www.flickr.com/photos/jonnosan/495660467/ Thanks to all for the assistance troubleshooting. The next question is, is this worth repairing?
Yes. Bridge each trace with a small wire and flow solder across the break to repair the traces and you should be golden. -michael NadaNet file server for Apple II computers! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."