Hey guys, can anyone help me out with this? I have a late 2013 rMBP 15" and as of recently, it keeps randomly shutting down. It started when I updated to El Capitan a few weeks ago, but I have since used Time Machine to re-load Yosemite, but the issue is still occurring. I don't think its a kernel panic because I don't get the typical Kernal Panic screen, it just goes straight to black. I have noticed it only happening when my laptop is on Wifi. When i am at work and plugged into my Thunderbolt monitor, it never crashes. However when I am off the monitor and using Wifi, it's occurring all the time (at least every 5-20 minutes). I have tried resetting the PRAM, SMC and have done a Repair Disk Permissions. Does anyone know what might be causing this or has any experienced anything similar?