My son's XT Live has the same problem. When it powers on, the LCD screen is back lit, but displays no text. The Red LED's on the AMP, STOMP, and MOD pedals is lit as well. No other lights and no sound or anything. We've tried to update it, flash it and see the same "question mark" next to the "Flash Memory" as shown above in the original post. I'm assuming that this means the unit is dead? Is there anything we can do? Thank you,