Well this sucks. Picked up my Captivate yesterday and noticed that it refused to turn on. Put it on the charger and managed to coax it into doing so. However, as soon as I took it off the charger, off it went. The phone will not stay on or turn on unless it is charging. The problem started on Assonance 5.2 but I flashed back to stock and it persists. I'm not sure what to do, this seems like a hardware issue. If I took it back to AT&T, would I be able to get a new device without them realizing that at one point the phone had been running a custom ROM?