My F90BT had 2.08 and it was running slow so I followed the thread to upgrade to 3.0. Now my system starts, it gets to the top menu and it says " System startup in progress. Please wait." After about 5 min it restarts and get back to the same point. I can get to the AV screen but not map. No matter what it restarts after about 5 min. I tried to go back to 2.08 with my backup but it didn't work. Any ideas?

Never mind I found the answer here

http://avic411.com/index.php?/topic/27807-fx31-complete-firmware-image/page__st__690__p__240057__hl__+f90bt%20+3.001__fromsearch__1#entry240057

Thanks

wingnutphil, forgive my ignorance, I don't get this, my HU is AFU with the endless boot up cycle. Could I possibly pm you to pick your brain on this? Thanks.