I recently got to repair a broken Panasonic Plasma TV It was much trickier than I expected. I have replaced power boards before in Vizio’s but they were LCD The first this I did was plug it in and turn it on to confirm the 10 red blinks. Then I took the back cover off to see if any caps were blown. There did not appear to be any bad spots. To the internet… I searched the model number to see what would come up. I use duckduckgo instead of google or bing. A few things come up notably some videos on youtube about how to fix a bad power board but those videos were for older models of TV.