I have a Riso RC6300 that has a T2 code. The fuse was blown on the power supply (F12), I replaced it and the machine kind of blinked off and on several times then the tray went down. Now it won't go up or down. There is 24v at the motor and both limit switches appear to working. Wires test good back to board. I can manually lift the tray into place and make a copy. What else do I need to check?