I updated the firmware on My 900BT and it loaded and installed. Then when it reboot, I see a blue screen the say "Start IBoot for My Flash Drive" and underneath that it says "Read Process 100%" then "Writing Process 100% " then a black screen. Nothing else happens. Could some please help. I'm a newby and I need some guidance from the pros. 
did u hold the reset button for 5 seconds?
Yeah I did! I also did the reset and eject one too. But no dice.
so uve turned it off and turned it bak on, screen now stays black after the update?
yeah won't leave the black screen. Though it needed time to boot up so I left it for like 5 minutes. Still black screen.
(taken directly from the pioneer instructions -- this is after you put the sd card in)
Now, turn ON your vehicle and your system, and determine which of the following applies:
1. If the system boots ups and displays the main menu, go to Step 7.
2. If the system does not display the main menu AND the screen is blacked out, press and hold the reset button and the eject button at the same time for five seconds and then release them. The system should reboot automatically and display the main menu. Go to Step 7.
3. If the system shows the “boot up screen†(see depiction below) BUT does not proceed to the main menu, press and hold down the “reset†button for five seconds and then release it. The system should reboot automatically and display the main menu. Go to Step 7.
step 7 is how to install TTS. try it and get back.
Did exactly that but still the same time. Is there anyway I can rollback the firmware and try it again?
thats beyond me, im sure another member with more knowledge of that would be able to help you, all i can say is keep trying. and did you take the sdcard out?
yep. thanx anyway.
yep. thanx anyway.
yep. thanx anyway.
well tyr doing it with the sd card still in. sometimes an installation requires a restart to finish
did that too. Same thing.
Have you tried yelling profanities at it? Sometimes I find that gets the job done. 
I have found percussive maintenance to much more satisfying...
better watch HiFi and Bob, nowadays Avic Protective Services will take your unit away if you abuse it
It's fix. Thank God. I reseted it over and over and final it worked. Sweetness. Thanx alot guys.
It's fix. Thank God. I reseted it over and over and final it worked. Sweetness. Thanx alot guys.