I have a panasonic sa-he200 reciever and recently i got the "f70" error msg, i found that meant an internal fuse had blown and so i opened it up and changed a 1.25A fuse with no problems. Only thing is a about a week later the fuse had blown again and now lasts about a week before the fuse needs to be changed every time. Does anyone know what else could be wrong with it? (all the other fuses are fine)