TV just turned off with 8 blinks. After power down, happens again.

My TV just turned off showing 8-blinks on power LED. Found information on a different Viera model and followed instructions (power down, wait, try again), and the problem reoccurs after a few minutes.

The other thread identified a part number to change, but it warned the part may be different for different TV Model number. My TV is the TC-P60ST60, so I’m wondering which board may need to be replaced.

Thanks for any help.