https://nfggames.com/forum2/index.php?topic=3362.0
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The plastic circuit board which has the buttons contacts for the dualshock 2 controller works slightly different from the usual controllers from older consoles.
Instead of being a simple open/closed switch like older systems, the PS2 controller uses a A/D converter to sense impedance variations on each of it's inputs. That added to a ball shaped rubber contact, causes the controller to be capable of reading the pressure applied to the buttons.
All buttons on the Dualshock two (exception being Start, Select and Mode) are pressure sensitive.
Sweat from the player's hand can enter on the controller and cause the conductive ink to rot, breaking the electrical circuit.
The microcontroller on the Dualshock2 pad is programmed to stop sending keystrokes to the PS2 if the A/D circuit is open.
Если это действительно так то это вилы, порты в приставке рабочие, проверял на ее родном джойстике. Провода пока еще не прозванивал так как где то засеял тестер. Загадочно то что у четырех джойстиков одинаковых по начинке одна и та же поломка.
