On my third LG Revo, after working without a hitch for several months, just got the blank screen/lighted buttons/vibrate thing on start up. It was after I turned it off, I believe with a low battery. Wouldn't do a hard reset either. Taking the SIM card out and starting up at least gets me back to a hard reset (and Clockwork Mod). Third phone from Verizon, same problem each time. Yes I rooted, but different ROM each time. Returned the rooted phones to Verizon without a problem BTW. I have been unable to convince Verizon to give me a different phone even after the same problem with three. If anyone else figures out how to get a different phone from Verizon, please post.