Reana Clio 1.6 2001 Falha

Hello,
my car has been having the same fault for a long time, it does not turn on, it does not make contact, according to the mechanics there is a failure in the barrier sensor and according to others there is not even the departure sensor reviewed the injectors and the battery but nothing, logically I have no idea of ​​mechanics, perhaps an help so that when I take it to the mechanic they do not continue to lie and that they charge me for something that is going to be bad for something that is going to be bad

Não faz contato? Ou não começa?, Se não faz contato, não liga a placa ou qualquer coisa é a falha atual da bateria para o interior e suas águas, se não iniciar verificações que atingem a bateria e o medidor de folha Luck