I have a laney from the mid 80's that just recently blew the low power fuse. This never happened before. I discovered, afterward, that my ohm selector is jammed in between 4 and 8 ohms and assume this either caused or resulted from the fuse blowing. I have replaced the fuse, and when I jiggle the ohm selector I get sound intermittantly, otherwise I get nothing. It is the dial type selector with slot in the middle for turning to choose beween 4, 8, and 16 ohms. Can I fix this problem? If so how? Any help would be much appreciated. Thank you.