If you have problems like me turning on your pimax
I finally found the solution !
using Sweviver video, (thank to you my friend )
I reinstalled the firmware of the headset, and now I have no problem turning on my pimax!
So if you have the same problem, I suggest you try to install the firmware again,
finally I can play with my 5K + instead of spending my evenings to turn it on, yesss