Plasma 50 inches dont turn on

I have come across 6 blinks; 7 blink and even 10 blinks.
the video below may throw some light. Not sure if the blink codes are universal across models. Panasonic plasma tv 7 red blinks of *****

1. Hold the front panel power button for over 15~20 sec and try.

2. See the youtube video
https://www.youtube.com/watch?v=awnrE3k_G2M

This link helps to diagnose

I unpluged mine and the light was still blinking when it was unpluged. I thought that was weird. So I pluged it back in and just heald the power button in untill the light went out. It went out within ten seconds. I pushed the power button again and the tv went on. WOOHOO!!! Just needed reset, I guess.

try to check power supply look for swollen capacitor it is the common trouble of plasma and lcd.

I have the same thing. Just started blinking 10 times. Pretty much had to unplug the unit over night. Could never turn it off and then turn it on again.
This worked for about a week. This morning, tried to turn it on after being unplugged. Still blinks.
Called Panasonic. they attempted a couple solutions, nothing. Suggested authorized repair shop.

Panasonic said "A" board,
A board SOS Detect (Explanation)
10 Blinks SOS: The voltage regulators IC5400 and IC5401 in the A board generate SUB9V and SUB5V. The 9V and 5V from these ICs are monitored by IC1100. Any abnormality on the SUB9V or SUB5V lines, triggers the shutdown circuit and the MPU shuts down the unit. The power LED blinks 10 times.

But need to measure the connection SC2, if it short, it will be the SC board.

The knowledge obtain from: Real case of repair by myself.
Information from Panasonic training manual.

i have exactly the same problem but my t.v is 50 inch been advised it could be the fan or lamp.