Hi i'm using supersonic tv model:SLM-3203 42 plasma the sound comes out perfect but the picture goes off after 5 seconds you have switched it on please help?

You can't. All televisions need a remote control for Advanced Functions. Just buy a new replacement remote.

https://www.google.com/search?q=supersonic+slm-3215+replacement+remote

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https://www.solvusoft.com/en/update/drivers/speaker/zebronics/supersonic/sub-models/ hope this works

not possible without remote...

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

hi could be bad capacitors in the psu board,thanks

shaun

If the sound is still heard then the inverter board has failed and is triping the powersupply,if no sound the powersupply has failed.

Len..

hi can i just add? I have recently got this tv but for some reason when i set setting to Normal they reset to dynamic?? After about twenty mins? I keep having to change back to normal or if i set it to perfect brightness etc... it just goes back to dynamic again? i.e cell light 100% and contrast up to 100%!

Why is this??

The tv is putting it's self into protection mode, this could be due to a simple component failure or possibly a faulty panel, Unless you are electrically experienced it would be best to have the TV checked by a service workshop. This model can have faulty caps in the power supply which is a straight forward fix but depends on your level of electrical skill.

can you tell use the patter in which the light blinks??

it will help us to decode the problem easily

try changing the channel with the original remote or by the tv's physical controls. It sounds like it has switch to an AV channel.