I have replied to you on another forum/group.
The Rowe Ami R-84 to R-88 did not have error codes, these were introduced on the R-89 to R-94 jukeboxes when they changed to the smaller CCC and discontinued the pricing board.
If you are in the USA, I suggest that you send your boards to AB leisure to test/repair them for you or to me in the UK.
Regards
Alan
Alan Hood
ami-man
UK