1. When restarting the mini box (switching off at back and then waiting 30secs and restarting) I get the welcome screen (with all the languages) then nothing on screen (just black screen when on).
Certainly for V6/TiVo, and I've no reason to doubt 360 is any different, a video output self-test is part of the boot sequence. If you've proven the HDMI & TV as ok with another box, then this sounds like a "box won't boot" query.
The answer to those queries is - in 99% of cases - a call to VM faults to report it. The only other "long shot" is, once the screen has apparently gone blank, just make sure the TV is still tuned to the correct input and it's not randomly changed.
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