Crashing Randomly what could it be?

"It time to go to an ASP instead of the Apple Store. Apple has no incentive to tell you about this or the Genius may just not know. The ASP gets paid by Apple to do the repair so they will be interested enough to help you. Have this test run: https://www.apple.com/support/macbookpro...

Remember, Apple is no longer run by a real man like Steve Jobs but by a corporate money grubbing !$$&*, Tim Cook. Tim Cook's Total Pay For 2014 Was Over $100 Million http://www.businessinsider.com/heres-how..."

"I would start by clearing the log files and then reviewing them after the next event. Hopefully it caught something there.

Black screen crashes are one of the hardest to nail down, often it's a hardware issue.

I would still go back to the Apple Store and have them review thier recall list. There where a few issues with this series related to the graphics."

Time to head to the Apple Store, recall time!

"Short story: check and replace the thermal paste over the CPU and GPU.

Long story:

I had the same problem, notebook freezing and after a few seconds a black screen (most of the times a regular shutdown). Took it to the Apple Store for a diagnostic and everything seemed normal to them, although they offered a continuous test during several days, which I declined. I needed the machine and the freezes weren't that often. I installed smcFanControl and that seemed to alleviate the problem.

Things got worse and I noticed the crashes were happening when the notebook switched from the discrete to the integrated GPU (used gfxCardStatus for that). For example, if I ran an html game on Chrome (with hardware acceleration enabled) and that switched to the discrete GPU, after 5 minutes and closing the tab I would get the freeze almost every time.

Before going to the Apple Store again and be told that the logic board needed to be replaced, I removed the heatsink to see the state of the thermal paste. It was dry and cracked, so I bought some Arctic Silver MX-4, cleaned the old paste and put the new one. Fixed the issue and the notebook has been working with no problems so far."