Switching PSU problem

[pedja089]

If - is bottom, then metal connector should go at bottom.
Screw doesn't make good contact. Also on vertical board with LCD, I don't see exposed copper or tin around metal connector.

[The Master]

I can move the connector to the bottom. It shouldn't be causing this problem though. The PCB has about 6mm of tin around the hole on both sides of the board and the hole is plated through.
The LCD board is exactly the same (6mm tinned both sides and plated through). On that board the ground plane is on the same side as the green wire.

[pedja089]

Can you measure resistance between socket and GND on board and post picture while measuring.
I really can't understand that there is static build up, and all symptoms associated with it, and such low impedance path to ground.
Can you test your main's ground? I don't know from where you are, but try to measure voltage between neutral and GND.