Used to be with the windows button and volume down on the Surface 3. Then with the Pro 4 it was power button and volume up. Can't find the combination with the Go. Thanks for the help!
Found it! Turns out it's the same as Pro 4 - Power and Volume Up. I was just off with the timing of the sequence and it kept turning it off to the point that I assumed they changed it. The key is to hit the power first, and then the volume up, a split second later...