I have a problem with my lmf1 plus. It was working fine until the past few days. it receives the signal from my 990, turns on and thats it, almost no sound. I have to put the volume of the sub on max and increase the sub output level to 15 and raise the volume to like -4 inorder to get anysound out of the sub. before I used to have the sob output at -2 and the level a little less than half and the bass was to much for my room. Is there a fuse that I can check or something. Does anyone have any ideas on what I should do?

I isolated it to the sub by trying to change the cable and try to use the preamp left output so send to the sub with no luck.