Printer randomly stop mid print

#1
New replaced board. Prints just stop in the middle of a print. No error messages or nothing. According to Cura/S3d Status is still "Printing" but actually the printer is Frozen.
 
#3
Just did it printing a test STL using Cura. half way through I came back and it was frozen. Hotend still hot and fan running. LCD says Printing and Cura says Printing. I can Pause the print but nothing happens. All I can do now is Cancel the print and it does.
 
#5
Printing via SD card works perfectly which is what I've started doing (I'm actually liking it better despite the extra steps).
When I print via USB is when it randomly happens. I've been reading up on it and I'm probably guessing it may be power spikes in my outlet which I wouldn't it doubt it in my old house.