Push the entire circuit board towards the tip side. There's a leaf spring making ground contact with the tip mounting ring, so you'll be pushing against light spring pressure.

The ground screw sleeve slots into the circuit board and may prevent you from shifting the circuit board. Lift up slightly on the power input end to disengage it. It probably needs to be lifted less than a millimeter.

I was sometimes able to lift the power input side of the circuit board by just pressing down on the opposite side. If not, try pushing up on the power connector through the case with a narrow tool.

Lift the power input side (and only the power input side) of the circuit board all the way out of the case. You'll need to push the circuit board towards the tip side with significant force. I think some very slight bending of the circuit board is required to get the USB-C socket past the flanges of the case.

Only lift the one side of the circuit board. Trying to remove it further at this point will likely result in damage.