I have had no issues with my F-50 head for the last year or 2 that I've had it. This past weekend we played a show and everything went great, but when I get home and set it back up, I cannot get it to make a sound. The power light comes on, and the cab and all cables seem to be working fine, so I don't have a clue what is wrong. There is completely no sound coming out of the amp. Can anyone help me?