I have repaired a plasma and LCD before. The LCD needed a new inverter and the plasma a new YDRV board.
One of my friends has a Panasonic P42S20B plasma, one day it was working fine, they turned it off and that evening tried to turn it on and there were just 4 flashing red lights. When the power is turned on it sounds like the panel clicks on and off straight away. Nothing is displayed on the screen.
Usually 4 red lights flashing is the power board so I got her a new one and fitted that but it didn't cure the problem, same 4 flashing red lights. Can anyone offer me some advice on what to try next? This isn't my area but thought I'd try to help her out as I have repaired TVs before and this looked like a simple job as others on google have had the same problem and a power board fixed it.
Can't imagine the board was DOA but I don't know how is best to test this.
Cheers
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