MacBook will not power on and no start up sounds

My MacBook will not power on despite having a fully charged battery and the power cord has a green light. I used all of the support suggestions online and spoke with an apple care rep. I was told that it seemed as though it was a power flow issue- the power button is not responding properly. I was also told that it doesn't seem like it is affecting my hard drive since there are also no start up sounds.
My question is, is this problem fixable if I choose to sell the MacBook? And how costly is the solution?

Sorry about Necroing a 1 year old thread but I am having the same issue with the same Model. Laptop went dead overnight, no led indicator of power. Opened the laptop and tested the AC adapter. I get 19.5V exit on the cable. Tested the power connector on the motherboard and getting the same voltage. Capacitator to not seem damaged. Any suggestion on how to troubleshoot this further? I love that laptop

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