Found a 55" Panasonic (600hz 1080p) plasma that stopped working. They want 100 for it. It's just outside of warranty and they were quoted 300 for a repair (75 for part, 225 for labor), but they don't know what part is busted. I'm hoping they get back to me in the morning with what symptoms it had, but do you guys have any initial impressions? I've never repaired a TV before or sourced parts. Any idea what this $75 part might be?