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Black screen MacBook Pro (13

My MacBook Pro (13-inch, medio 2012) is having troubles while booting. When I press the power button, the power light goes on, and that's all. The Apple logo on the back of the screen does not illuminate, and I do not hear the Boot Sound (or “startup chime”). Furthermore, when I press on Caps Lock, the caps light does not go on. The screen is complete black.

I tried to reset the System Management Controller (Shift+Control+Option+Power) and PRAM (Command+Option+P+R) to resolve, but this did not help.

What is your idea now, is this a sign that my logic board died? Is this something that can be fixed? Any other tips to debug the problem?

最后更新：2017-09-04 17:29:33

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