I think, while hikey960 is working, I touched it with my hand. Maybe it was fused then it shutdown.
I tested that while it is working, I dont touch it, anything happened.
I want to ask another question @danielt. I need to use my hikey960 board with optee + android for my academic studies as soon as possible. When does Hikey960 support optee? @vchong said that there is no estimation time. But, If it will support optee after 3 months, I want to know for my studies. It is important to me.