I've already had the unit apart several times. Didn't find anything that would point out a problem. It's just strange. The unit works perfectly fine, there is just no response whatsoever when I use the buttons/knob. Boots fine, displays fine, streams tunes fine, can upload/download fine, ftp to it with no problem, I've reloaded the 2.0 final upgrade and hijack.. etc. etc. Everything worked. Just can't access any front panel control (nor from the remote/sony stalk).