I just got a new modded xbox. When I power it on the light around the eject button is green, but turns orange shortly after. My old unit stayed green all the time. Is there a problem??? I did a search and it seems to be that it might be a new bios. Is this possible?

Have you plugged the video cable in correctly.

Flashing orange means there is no cable attached

if it's solid orange and works fine, then whoever modded it, modified the bios to change the led to orange. kind of a reminder to let you know the mod is on :)