Booting for the first time

Hi!

I've got my BB to boot by plugging in the USB OTg port and can see the bootloader on ttyACM0

my questions are:

1) Does u-boot produce a video output on the LVDS by default on a rev C2

2) What resolution if so

Plugging the DVI port into my TV with a HDMI lead produced no picture and the TV shut down.

TIA,