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."

guys lets be realistic, dont you think that apple kinda send bugs in the new updates to make go buy a new computer as long as well are all experiencing the same issue?

"Same model, same problems. https://xkcd.com/979/

In fact, my MBP crashed twice while writing this answer.

Edit: Brought my MBP to an ASP. They diagnosed this to be an issue related to WiFi. They couldn't reproduce crashes when connected over Ethernet. Even when they replaced the AirPort card with a new one, the crashes would persist, suggesting they had something to do with the logic board. So, they offered to replace the logic board for 800€, uncertain that it will even resolve the problem. Great job, guys! Now I have to decide whether to sell it broken or repair it before selling.

Edit2: Brought it to an Apple Store for a second opinion. They found out that the crashes relate to a defective RAM module. Treatment is the same though: Replacing the whole logic board for 650€. I found some independent site which replaces RAM only for 100€, let's see how that turns out...

Edit3: Well, big surprise: They'll actually return my device right away, since RAM is (very obviously) soldered onto the logic board. Why even bother to offer that kind of service? This means I'll have go with (an independent) logic board repair (350€ max)."