I'm curious how this worked out. I am in a similar situation. I'm prepared to buy the power supply (have it in my cart now) but worried it's not the fix. I too have only the first LED lit, but I have no sound whatsoever.
I should have come here first. I watched another video that said to just lift on the sync cable. I broke the tabs (or at least one of them). I'm comfortable doing the rest of the install, but wondering if I rig that connection when I put back together. Ideas?
