Chosen Solution
My macbook pro was working fine, I left it charging overnight and went to turn it on and it wouldn’t boot up. It alternates between a black screen with just the disk drive sound, and freezing at the same point every time at about 5% on the boot loading bar. I’ve tried booting from an El Capitan flash drive and it does the same thing, freezing on the loading bar. I took it to the genius bar and they did a hardware test and said everything was working, but then said it was unfixable and probably a problem with the logic board (£500). Is this the end of the line or is there anything else I can do before having to buy a new laptop?
I took the laptop to an independent mac repair store after the problem failing to be diagnosed at the genius bar. Turns out the problem was one faulty RAM module and 500 reallocated sectors on the hard drive (probably not the issue but not great either). I’ve now replaced the faulty RAM and am in the process of putting in a new hard drive.
May not be the end of the line! ;-} This is a early symptom of a failing tantalum capacitor in the dedicated GPU power logic. During the boot up the system starts off using the internal Intel Iris graphics services then switches over to the dedicated GPU (you’ll note the gray screen changes hue a bit thats the switchover) Here’s a good YouTube vid on how to fix: MacBook Pro GPU Fault: C9560 If you’re not to doing this your self there are a few Mac specialists with the proper tools and skills to fix this for you.
