My sub-woofer suddenly stopped working. I thought my sub went bad but when I hooked it up on my other receiver it still works. I connected my friends sub to my 3805 and that too will not work. I used both manual and auto setting (using the mic) to set up the speakers. The receiver just cannot find the sub. Is there a setting that I'm missing or not seeing? Does anyone had this problem before? Thanks in advance for the help!