MacBook Pro 2014 model wont turn on even after SMC reset

I have a Macbook pro 15inch 2014 model. It was not starting a day before yesterday. It was working perfectly fine a night before that. So I did an SMC reset many times and pressed power button many times too. It started working and worked throughout the day perfectly fine. But next morning same problem occurred but macbook never started. Its not in warranty period, therefore I need a low budget solution. There is a clicking sound too when I press and hold power button but stops immediately after I release the button (sound is too low and have to put my ear against back cover). Please help to figure out which part is faulty.