MacOS – MacBook Pro wont boot at all (El capitan)

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My MacBook Pro stopped working. I was using it without a problem, then all of a sudden the screen went Blue.

It didn't respond at all so I did the obvious, force shutdown. Since that moment the computer starts but won't boot the OS.

OSX: El-Capitan
HDD: Momentus XT by Seagate (Hybrid)
FileVault: On
OS starts and gets stuck in the middle (progress bar)

What I've already tried:
Tried boot it with Cmd + D,
Cmd + C,
Shift Key (safe mode),
Disk utility won't even start,
Reset nvram (didn't work),
Swapped my HDD to another MacBook Pro (works flawlessly),
And finally tried booting from an USB stick with El Capitan OS X.

I've read around that it could be Hardware related problem, I'm looking around with no luck. Any suggestions?

Best Answer

This definitely sounds like hardware issue, based on the fact that the HDD worked on a similar Macbook Pro.

Before we rule it as hardware, lets perform an Apple Hardware Test .

Apple Hardware Test (AHT) contains a suite of diagnostics that will test the hardware of your computer. It's a great way to rule out a hardware issue when troubleshooting your computer.

If your Mac was released after June 2013, use Apple Hardware Test.

Otherwise, if your Mac was released prior to June 2013, use the Apple Diagnostics Test.

Fortunately Apple does a great job with documentation, so I'll avoid repeating the instructions mentioned in the provided links.

Once the test is complete, please reply with any error codes presented.

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