El Capitan does not start after a freeze and a forced, bonded stop on the gray screen

Hi all

I have a MacBook Pro 17 "late 2011, 2.4 Ghz, 16 GB RAM with OS X El Capitan installed, the latest version with all the updates." A year ago, I've had my Toshiba HDD replaced by Samsung SSD 250 GB SATA III 850 EVO and the Toshiba disk has been moved to CD using LMP disk Doubler Bay, at the same time, I had my RAM went from 8 GB to 16 GB of RAM, I have now. The OS X El Capitan is installed on the SSD. In this configuration, everything worked well, with absolutely no problem whatsoever. Sometimes, I ran disk utility to check both of my hard drives and no problem.

Unfortunately yesterday, strange things started going. First of all, I noticed some unusual glitches when you browse the internet with Safari. I'll try to describe the best I can because they lasted about 2 seconds, so I don't recall. In any case, all of a sudden, as if half right of my screen has shifted in the middle of the screen and it was wrong and image around was all damaged or distorted but legible. He'll be back to normal when I switched between applications or revealed the office displays the windows of all running applications.

It was similar to this (below) but much larger.

Then, I continued my work as if nothing had happened, when all of a sudden my mouse pointer disappeared and the system froze completely. It was just totally frozen, the time was not moving and the computer did not react somehow to the keys I pressed. Unable to do anything, I had to press and hold the power button to turn off the computer. After starting it again once I hear the ringtone, I see the gray Apple logo and the loading bar. When the loading bar reaches about 40%, a coloured horizontal line appears (see photo below), then it subsides quickly followed by a black screen, which is quickly followed by a blank grey screen with no Apple logo or the bar loading, just a gray screen Uni, where I'm stuck. The computer turns off by itself after about 15-30 minutes if I leave it like that on the gray black screen.

The coloured horizontal line:

http://i.imgur.com/9rzEyc4.jpg

I can't start in safe mode or recovery mode.

I CAN only boot single user mode, Apple Hardware Test mode, the boot (by holding the ALT/OPTION key) Manager and verbose mode. Also, I can start on the Internet recovery mode but once the download is complete, it is stuck on the gray screen (gray screen with the Apple logo WITHOUT horizontal line-online quick clear-online stuck on the gray screen black screen)

After a lot of googling and reading, that's what I've tried so far:

-' fsck - fy " in single-user mode

-running Apple Hardware Test and the Apple Hardware Test extended, both are zero problem

-Reset PRAM and NVRAM, MSC, several times

-with the help of this guide: https://www.afp548.com/2015/01/14/when-yosemite-has-fallen-and-it-cant-get-up/ in single-user mode: "rm - rf / Volumes/Macintosh\ HD/private/var/db/BootCache * '

"rm - rf/Volumes/Macintosh\ HD/Library/Caches/com.apple*"

"defaults write DSBindTimeout HD/Library/Preferences/com.apple.loginwindow.plist Volumes/Macintosh\ - int 10.


-in single-user mode: empty the trash

-in single-user mode: "sudo purge"


-in a single user mode: 'exit' or 'reboot'



However, during my fight, I could successfully arrives at the login screen, log in and use my MacBook for some time, about a half hour before the same thing happens, the mouse disappears and the system to freeze completely. I remember that both times where I was able to get to the login screen, it was after I had been in single user mode and typed 'Quit' or 'reboot'.

The above colorful horizontal line also appears in the single-user mode when I type "exit" AND I am UNABLE to get to the login screen later (photo below). It just goes to the gray white screen. Those two times when I was able to connect to exit single-user mode, the horizontal line colored is NOT appear in single-user mode.

The horizontal line colored when you exit single-user mode:

http://i.imgur.com/0tOVEO6.jpg



Here's what I see in Verbose mode:

http://imgur.com/LJIRyo

http://imgur.com/4HF4hvJ

http://imgur.com/uMdHY5Z

http://imgur.com/WSswHKK

Tags: Mac OS & System Software

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