Tv turns on for 1 second and turns itself off

The only clue is that you posted to Television and Video.
All questions need full 'make model (what it is)' as first 3 words.

Check your power source.
You may also have an issue with your outlet. Try plugging the television into a different socket, preferably one not connected to a light switch. Or it could be a problem with your surge protector; if you've been using one, unplug the TV cord and connect it directly to a wall outlet.
May 18, 2021

TV turning on and off by itself? Here's why-and how to fix it

Asurion https://www.asurion.com > connect > tech-tips > how-to-...

I turn on my TV then after a few minutes shuts off what's the ...

Quora https://www.quora.com > I-turn-on-my-TV-then-after-a-...
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When I turn it on it shuts off after a few seconds. It's a

JustAnswer https://www.justanswer.com > TV Problems
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Help library: LG TV Powers On and Off Intermittently ' LG CA

LG Electronics https://www.lg.com > Home > Support > Troubleshoot
Jun 24, 2023 - The TV turns off on account of lack of memory/cache overload to clear out a lot of that unnecessary stored information. The occasional alert ...

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

Sharp Aquos "crashing" - HDTV - Streaming Video & TVs - Tom's Guide

www.tomsguide.com/forum/24705-4-sharp-aquos-crashing
Aug 11, 2005 - 7 posts - ‎1 author Archived from groups: alt.tv.tech.hdtv (More info?) I have a Sharp Aquos 37" LCD TV(37GD6U). Every now and then I can turn it on,

Sharp Aquos problem - YouTube

? 1:41
www.youtube.com/watch?v=-EuJZ9NUf3Y
Apr 24, 2012 - Uploaded by rsimon24
So my tv is just turning off by itself, some people tell that is a software issue, others resistance hardware. Has .

if you take the cover off, then take a look at the capacitors.
check if any have bump ..

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My new sony xbr 55hx929 on occasion shuts itself off and comes back on within a second or two. shuts off to the point when it comes back on the sony logo on screen is displayed and in the upper left hand corner the input (hdmi 1) is shown follow by the program on tv.

Lamp needs to be replaced.
Mats has them for $99.00 1-800-628-1118

"LAMP"LED light indication blink?The projection lamp has not been change in this tv like a 1 1/2 or 2 years?Tv on and used like 4 or 5 hours a day?The projection lamp life is over.Require a new projection lamp.

I would try leaving the TV unplugged for 30mins so the TV can reset itself.
If that doesn't work, your TV should still be under warranty. I know 95% of come with a 1 year warranty.
The most common problem with Sylvania TVs made by FUNAI, the Backlight Inverter board fails to early in life. ( That's the part that powers the screen)
The Tv can't power up the screen and it turns off automatically. Basically called "Protection Mode" so it protects the other parts inside the TV.

you have the famous zenith shorted picture tube