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Message: [QUOTE="claudiu91, post: 1545292, member: 20574"] First time when I got this problem I thought it was a software issue, so I reinstalled OS Sierra from a USB drive (downloaded from App Store, put it on an USB drive). I performed a clean install, I formated the main partition (at the time I had 2 partitions) and installed the OS. I was kinda happy because I didn't encountered any issues at all through installing process. In the first 5 minutes of using the OS crashed badly like before. I said wtf, must be a problem with Sierra or something. After some googleing I decided to install the osx from Internet recovery mode, so I did... It was an old version of OSX... I can't remember exactly which one, probably snow Leopard, it had the old interface with the glossy dock. I was happy again because the installing process went well and I was convinced this time it would work... I booted up the OS and after a few minutes it crashed again, same thing blackscreen with the backlight lighted on. I reinstalled Sierra, no surprise the problem came back as soon as I booted up the OS. I was very intrigued by this issue and I made a live stick with Linux, I plugged it in the laptop, boot it up and surprise, surprise, my laptop was running without any problems at all... I test it thoroughly, for hours, no errors no nothing. I use it for some time with Linux and one day, by the chance I plugged it into a monitor via hdmi, I had some work to do in excel, and I prefer to work on a wide monitor... Anyway after I finished my work I forgot to plug it to an outlet and the battery died while I was browsing the Internet... Then I plugged to an outlet and when I turned it back on I didn't paid attention to boot it in Linux, so it went straight in OSX... By that time I didn't know that if it's connected to HDMI it works fine, so I was impressed seeing it working again in OSX... I unplugged it from HDMI and move it from the desk and immediately crashed... After multiple tests I was convinced that if it's plugged in an external display works just fine so I bought a dummy HDMI (it's like a small stick that mimics an external display)... I was right about that matter, it's working fine, and I can still use it as a laptop. Just from pure curiosity I decided to make a bootcamp partition (it was very annoying because I had to merge my partitions into one) and after that I was able to make a bootcamp partition... After Windows 10 installing process was finished I installed all drivers without any issues, I even downloaded Steam and installed Metro, played a few missions, no problems whatsoever. I went to an Apple authorized reseller and they told me I have to change the entire motherboard (~$700)... Asked them what's the problem, they said the motherboard... I was pretty furios because it was such an evasive answer. I said no thanks, and I took it to a 3rd party service, they told me I need a CPU reballing so I told them to do it. After this process it workd for a few days and the problem came back immediately after I moved it from the desk. Sometimes if I shake it or drop it hard on the table it works for minutes, maybe hours, without the HDMI dummy plugged in, so I excluded any software issue. I forgot to mention... I run the diagnostic process may times and it passed it without issues every time. I hope I didn't bored you guys with this long description and I have to apologize for my bad English. [/QUOTE]

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