In reply to:
Out of curiosity, have you worked out what the problem was that was causing it to not respond to commands?
Honestly I haven't found anything wrong with the audio section or any problems responding to the front panel or the remote. I should have confirmed the symptoms before I opened the unit up, did a visual check and re-seated all the connections.
I have only checked the RCA audio outputs because I don't have a Mark 1 dock. Did you try the RCA outputs or only test using the dock? I'll put the scope on the dock outputs and see if they look OK.
I have a couple of companies chasing the display for me but haven't managed to find anyone local that has them as a stock item. Hopefully I'll have some answers on Monday. We may have to take Paul (pgrzelak) up on his offer.
Rod.