Does anyone know what this code is and how difficult is it to resolve
the problem? I've had four of these from a local school come in over
the past few weeks. Thanks. Lenny Stein, Barlen Electronics

Hi Lenny,
F04 is a loading problem. If your mechanism is gear timed (aligned)
correctly check the mode switch which is soldered on the main board and
located under the main cam gear in the rear right corner of the deck. I
have loose solder connections on several of these mode switches and
several with dirty mode switches. I too do them for a local school
district. -Mike