PS2 Dual Shock 2 Controller not working

[BooperGrandson]

Hello, I bought this Playstation 2 Dualshock 2 Controller off of eBay to repair. It seems that none of the buttons are working. I even tried cleaning the controller, including the contacts, rubber pieces, and buttons. I also tried switching rubber pieces and buttons; and I tried crumpling up paper to put inside the buttons. Nothing worked. When I go to use this controller, the Analog LED lights up, but none of the buttons work when I'm either in the main menu or playing a game. I've tried other functional controllers and they work flawlessly. Does anybody know how I could make the controller's buttons work again? Help would be greatly appreciated. Thank you and have a nice day.

P.S. I have a lot of the same Dualshock 2 Controllers that don't work, that you guys could probably help me with.

[MuncieGameArmory]

The contact membrane is probably shot.  Have you attempted to check all connections on the controller with a Multimeter to determine if there is a short?  Do the Analogs work?  If they do, it is probably the contact membrane for the digital buttons.

Don't factor out loose wiring in the cable.