Brother EX 660 sewing machine (Big Timber & Randall Rd, Elgin)

a used Brother EX-660 electronic sewing machine. I dont have the service manual for this. It is giving the error code F4 you google it, it could mean 4 different things. One is the bobbin winder not functioning!! And that is what is missing so instead of trying to get the parts I thot someone might be interested in it for a parts machine. Everything else looks like it is there except for the inner rotary hook.