Have the same problem with the flashing green light and tv not turning on. I unplugged the power strip this morning and when I got home tonight I plugged it back in and am getting the flashing green light. Flashes 12 times then pauses, then flashes 12 times again. Had this set serviced 6 months ago with a bad power supply and capacitors. Cost me $1000 and now this problem. Beginning to think this Mitsubishi is junk.
Sorry I couldn't be of more help. Did you ever get your set working?