I just received my developer kit and found myself stuck in a situation where my Apple TV does not react on remote. It happened after about an hour or so after I installed beta 2 and configured the device. Apple TV displayed "Remote Connection Lost" message in an upper right corner.
Any idea how to fix remote? I tried restarting it by unplugging power cord — no luck.
Might just need to be re-paired. See: https://forums.developer.apple.com/message/61253#61253
Also be sure to cable it up so it can charge (white cable).