Hi there, I just had the same problem and just fixed it about 5 minutes ago using a Mac computer. I tried so many times on a pc running windows xp and could not get it to work. I had a friend who works on phones, but he couldn't fix it. I tried to overclock my phone and it crashed and I thought I bricked it. It got stuck in some kind of crazy reboot loop and would not fix. I used a mac and reflashed with RX-51_2009SE_20.2010.36-2.002_PR_COMBINED_002_ARM.bin and everything started up again. Thank God it is working again.