Thanks for your reply Alan.
When I pressed the cancel switch the cancel LED lit, also, when in the service mode, pressing the cancel switch caused the magazine to scan.
However, now I have a whole different set of symptoms/problems. I reseated all the connectors and now the magazine scans continuously. The following mech control LED's are lit: cancel, opt. switch home, mag motor and detent. The same conditions occured when I installed another computer control center.
I am really confused. I have a spare mech control board, which is a 4-07221-05, but it does not have the auto mix connection on it. I don't need the auto mix function. Will it still work in place of the original mech board (4-07221-01)? Does this even sound like a mech control board issue? Thanks. Randy.