42 in lcd vizio "no signal". Just last night my vizio "broke". When I turn it on, it

Question

Just last night my vizio "broke". When I turn it on, it says "no signal" on a blue screen and then 5 seconds later the tv turns off.

I saw where you mentioned that it is the main board.

When can I get a new one and what is the price range? Is it easy to install?

Can there be any other diagnosis for my TV? Like a cable or something?

Thank you.