I can only get video from 1959 bios. I have flashed 2913, 2914, 3029 which seems like a successful flash on either of the 1mb banks, but no video when restarting, only audio. I have been using 1959 for a few weeks without any problems.
Xbox 1.0
1959 bios banks 1-4
160gb Samsung
Avalaunch 0.49.3
Xbox 1.0
1959 bios banks 1-4
160gb Samsung
Avalaunch 0.49.3