When i turn on my lg smart tv it comes on and shuts off

[chevyordie383]

My lg smart tv 47LN5700-UH
comes on then shuts right back off

 

[hang-the-9]

If it's in warranty, contact LG. If it's not in warranty, how are you with working on TV? There is no magic "hit this button and it will be fixed" thing here. You need to check over the boards and possibly replace some.