So, i bought an as-is xbox (New slim black model) from Craigslist thinking this would be an easy fix, running out of ideas:
Tried multiple hdmi cables
Component cable only displays audio when in HD mode
Component cable in tv mode display yucky lines but works
Composite AV cable work perfect as it should
Tried the Y and R trigger on start up
Any other ideas suggestions? Anyone ever heard of this? How is it possible for the 360 to lose its HD capability?