ya im having the same issues with mine it will turn on then turn off mine only runs off of the usb powere from the pi zero itself

so i got everything running when im testing prior to putting it in the case. so it will run off the power from the pi zero itself and boot up just fine. but when i go and put it in the case and take it off that power and have it run off the battery (which is fully charged) it will turn the screen on...