eBay ad for this SA-7100 says "PROTECTION ISSUES! All in caps, "power light does not come on" "no sound". I pick it up for $90 total. Free shipping. Put on the dim bulb it doesn't light up, protection light comes on a little longer than normal, then I hear the click, so I know there's power, so the bulb is burnt out. Put the headphones, yep, no sound. So I'm moving the CD cables to another set of inputs and lo and behold THERE ARE NO JUMPERS on the Pre Out -Main In! Plug in the jumpers and guess what! It works perfectly ! Jeez you do win one once and a while!