Firmware upgrades are always a nervous moment. I did my 2.0 upgrade from a downloaded ISO image as I could never connect to the servers...

If you are connecting video output with HDMI->DVI, I believe the HD output switches to RBG/PC unless you have a device like the Lumagen which can do EDID handshakes and negotiate YCbCr (video) from the device.

Certainly you must ascertain, and calibrate, for the video/PC output correctly or you will have black level issues.

Mark