STAND BY RED LIGHT TV NOT POWER ON

https://www.youtube.com/watch?v=IrC77AnKF4g
Your Panasonic TV's power light blinks when you power it off or on, or put it in Stand-by mode. ... Press the "Power" button again to set the TV to operate in Stand-by mode. The Power LED Indicator should illuminate as a solid red color. Press the "Power" button on the remote control to bring the TV out of Stand-by mode.
https://itstillworks.com/12594583/how-to-troubleshoot-the-blinking-power-light-on-a-panasonic-tv
https://www.youtube.com/watch?v=kJs4TpaXfX4

A lot of people are confused about turning the TV 'off'. If there is a light showing when the TV is 'off' it is merely on 'stand-by' and not truly off. Off means being physically turned off by either the switch on the set or the mains. using the remote to turn 'off' the TV will not turn off it will only put the set into stand-by mode. In many cases if the TV is in stand-by mode, and then switched off, when the set is turned back on, it will still be in stand-by mode, and will need to be turned on with the remote. (even if you unplug, in some cases) All TV's are different, so will operate differently of course.

Replace the power supply board. You can get the replacement power board from www.tvrepairworld.com

Power supply or related to it.

Hello
Three blinks of standby light to Sony TVs indicates that the regulated voltage output from power regulator board is above thatn normal. The problem is with its power supply regulator board. Replace all the electrolytic cpacitors on that board with new ones. Replace all of them including small and large ones, at one time. OK.

Ur power board have dead capacitors,Know how to solders?Take the tv aparts check for capacitors puff up or burst open in the power board.Replaced those capacitors.Or tries Shopjimmy.com,Ebay.com buy a refurbih power board.

upon hitting the power button, the red light showing on the front of the tv should flash a couple of times, the screen should come on and the light goes off..the red "stand by " light stays on and we cannot get the screen to come up..needless to say, cannot get to the menu to change any display options...any suggestions?

turn tv on picture comes up 2to3 seconds later tv blacks out then stand by red light flashes 4 times in a row repeatedly..can not turn on or off when stand by light starts flashing but before tv blacks out you can turn tv on and off repeatedly and picture and sound work.You have to unplug power cord for 30 seconds after stand by light comes on to get tv to turn on.

The problem is the digital main board if you can get ashop to order it for you its easy to replace yourself four screws and three or four plug in connectors.