Tv keeps turning off on its own but you still get sound

One of the board from inside the tv is damage.

You will need special tools and expert knowledge to keep from hurting yourself. The inside of a TV has very high voltage...and the capacitors can keep the voltage for days even if the unit is unplugged.
It sounds like the tube is shot. It might cost more to buy parts than to replace it.

Contact the authorized service center. It sounds like a corrupted firmware. Firmware update might be necessary. Gopakumar Gopalan Google

is it flipping back to Auto setting without you turn off the tv or unplug it ?


http://www.tvrepair.localdomain.me/

You probably have blown capacitors on the PSB-power supply board. Recaping with new UF caps works 90% of the time. The set turns itself of into a fault protection to keep from damaging more components internally. A few bucks a soldering iron some solder should do the trick.

keep tuning the sound and pictures have different frequencies.
okay

Hello Blindrid,
What I would suggest you do is Press your MENU button on the tv remote, Then down to SOUND and then Turn the AUTO VOLUME to OFF. Then come out of the menu screen.
Just to check that it has all work correctly. turn you volume upto a certain number for example 25
Then turn your TV off the turn it back on. Wait until it is displaying a picture then press the volume button Once either up or down and you should see that it will go to 24 or 26 depending on what button you pressed for the volume. This will keep your volume set to whatever you had it on before you turned the tv off.

Hope this Helps Please leave a thumbs up.

Cheers

Little Dish Fitter

re solder the Electronic semiconductor , IC Specialy in power supply side. cold solder might the cause.

so is this sound on the tv or a sound system

Took it back to the store.