shut down randomly

Hi I updated my laptop to El Capitan some months ago and since then I've been getting some strange issues: 1. Laptop sometimes shuts down in random moments 2. Laptop often shuts down when I wake it up from sleep 3. Not so important, but if I plug my external HDMI monitor before turning on the...

My Hackintosh has been built up about three months, but it sometimes shut down unexpectedly. This time, I used Chrome to explore Facebook, and I wanted to upload a phone to on my facebook. But when I press the photos icon, the screen became black and restart again(Kernel Panic) . Show you have...