Hi Bruce,
Guess the 'A-Board' is the SSB. Thought try update firmware via USB but the set wouldn't have any of it, just sat there saying 'Panasonic' 'till it cut to S/by after five minutes.
Recall a Quuq chap a while ago had the same set, where occasionally it gave a picture of sorts so he could update it to perfection - 'Bonesy' as I remember, but sadly he seems to have vanished from Quuq, though thought him nifty - Chris.