TV shuts off.

Do a Power Reset.
1. Turn off TV.
2. Unplug the power cord of the TV from the electrical outlet.
3. Let the TV remain without power for 60 seconds.
4. Plug the power cord back into the electrical outlet. (If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.)
5. Turn on the TV.
If issue persists after doing the steps, reset the TV to factory default settings.
1. Turn on the TV.
2. Using the supplied remote, press and hold the UP arrow button.
3. While holding the UP arrow button press the POWER button on the TV itself.
4. When the TV goes off, release the POWER and UP arrow button.
5. The TV will turn on by itself and the initial setup screen will be displayed. Just follow the on-screen prompts to finish the setup.
Sony KDL 46V5100 random shut off 15 20 sec

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Get help with audio, video, or power on Apple TV - Apple ...

https://support.apple.com/en-us/HT200197

Apple

Check this out....
http://www.fixya.com/support/t21733332-toshiba_46l5200u_turns_off_after_red

No,call hire Tv Tech.for this job.Must troubleshoot to find out why the RED colors gun is dying.Could be anythings or the RED colors gun Yoke is dead.

no..thats hard one to fix it...

go to the expert technician so that they know what the real problem about

Green light flashes 5 and then red light flashes 6

flyback on the verge of giveing out on you.. needs a new flyback..

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Good Day,lizbg;
Check the solder connections at the negative side of both C809 and C810. Resolder if necessary. This a common problem with model.
Good Luck, Big Irish.

my screen will turn on right after unit is plugged in and stay on for a short period of time, then it shuts off and the red light near the power button blinks and teh tv will not turn back on. there might be problem of loose contact in power supply Thanks