Chosen Solution
My ZTE Z Blade Max shows that the home button has its light on, and is off. I keep trying to turn it on, but it vibrates then turn back off and continues with the light on. I even have tried with the charger plugges in. Same result. I was able to figure out the device has half its battery used. I try to restore the device but it decides to turn back off after trying to reset it.
Seems like the battery ran too low/is acting up. Try plugging it in overnight and let it sit. Then in the morning, try to power it up. Usually, when a phones battery runs down too much, you have to plug it in and let it sit, or else it will not have enough juice to boot up. Let me know what the result was.