You make it, We break it
What video connection are you using on startup? If it's HDMI, you may want to try component or even S-Video to see if you can completely startup. If you can, do a red button reset and when you see the "Hello" screen, type 02468 on your remote. This will force the latest software download. If you can get it completely started up from there, turn off the unit, hook your HDMI back up, and turn it back on to see if it works.