I've read all the topics so don't flame me to read more. Has anyone confirmed a way to fix this as my waranty is out and they want $200 to fix it. I have a 700bt. Thank you.

have you looked at this thread:

viewtopic.php?f=33&t=22763

there is alot of information there about the rebooting issue. even though its the 900bt i think the system are similar enough for the fix to work on the 700bt

i have a f90bt and it did the same thing. but in my case it was the ipod. i noticed after i disconnected it it booted up like nothing happened. i pllugged it right in and it rebooted 10 sec later. so i just reset the ipod and it plugged it in and worked perfect. no random bootups no more.