r the omoo francis from nvti the head of electronics class?am one of your former students hi.

Hey had the same problem. Model Panasonic SA-DK2. Turned on the unit and F61 poped up and unit shut down. F61 code is general code for output stage. 1 - Remove all speaker wiring, volume low and try again. 2 - If not external remove audio amp out put board and resoldier all the legs. Part 2 fixed mine without a problem. Good Luck.

I'm having the same problem. Any solutions yet?? --Howard