I got a cheap SHARP LC46XD1E from ebay. Refurb it and turned it on, all worked, very happy. Then as usual, I tried to measure inverter output with a DMM, 5mm long plasma jumped out of the secondary inverter coil to the meter probe, then everything went kaput! Maybe some lights blinked, but I kept pressing the power button and didn't see it. Relay clicked for 1 second and off again.
P-CH MOSFET Q7403 on the #2 inverter board (out of 4), was shorted out.
1. Replaced the shorted MOSFET, still not working!
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