Hey guys, wanted to see if you could assist me. I have a 2014 Mac Mini I purchased from Craigslist (I know). 1.4GHz, 500GB Hard drive, 4GB RAM. It seemed to work fine but has done nothing but crash since I got it. Short story: Fired it up, looked good so I immediately took it apart and put a Samsung 850 Pro SSD in it. From there I loaded up all my normal apps and begin to use the machine. Then the crashing started. I gave up on the SSD and blamed it. Put the original hard drive back in but still does the same thing with any type of load or real use. I can do minimal browsing and tasks but it will eventually crash. See photo below: The image goes crazy, sometimes a small pop as it crashes. Then on restart it take several tries and I usually have to reset PRAM to event get to boot back up. I am running Sierra on it and have also tried running off a 3rd hard drive that is attached via USB. Same results, I can get it started up and start to use it but it eventually crashes like the above photos. I have $300 into this Mac should I try to sell for parts/repair and take my loss or is there any hope? Thanks for any suggestions. P.S. Could it be possible I damaged something when taking it apart to install the SSD? I felt very good about the installation, nothing out of the ordinary. I used all the correct tools, etc. --- Post Merged, Apr 15, 2017 --- UPDATE It appears the Mac Mini is completely dead now. I plug it in and try to start up. Nothing happens. The front light blinks about 3 seconds apart and I can hear a very faint sound (almost like a faint beep, but not really a beep). The sound is synchronized with the light on the front. Could the previous systems of crashing/freezing be related to the power supply?