Any combination I press brings up the turn off menu.
If you can't take any screenshots using the built-in combination method, then I recommend you to install a screenshot application from Google Play. Just navigate through results and you will see that there are applications that don't require a rooted phone.
I went to Google Play but all the apps that CLAIM to be NO ROOT continue to atsk me to root my phone ! @peteclapp
Press the down volume button and the power button and hold
I got a ZTE Warp Sequent (ZTE-N861)earlier today.
Pressing Volume Down and the Power Button on the top of the phone SIMULTANEOUSLY gives a screenshot every time. (Hold the buttons for 2 seconds.)
I tired the built-in feature but the volume and off feature comes up