First check Diagnose in hlp tab if using pitool.
Try the below
You will need a copy of the firmware for p4k I think @Century has a copy and you will need to reflash the firmware.
If you power the p4k when it is dismantled there is a light sensor that will brick the headset but is not unbrickable.
If needed submit a ticket and Doman or another support tech can assist.
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