I replaced one of these boards for a close friends of ours a few years back. Just check that one of the AC line fuses is blown. It likely is, and that will indicate you need new power board. Replacement was easy.
There are refurb boards, as there are plenty of these boards to refurb. There is no shortage of blown ones!
If you do replace, then you need to look at OLED. After a plasma you will not be happy with a LED TV. I have one OLED and a couple of Panny plasmas on the place. Honestly the PQ between the OLED and the older 2K plasmas is marginal, but it is improved. After looking at LEDs 4K HDR the whole works, they would have been a downgrade from plasma.