SONY Remote Control - some buttons do not work.

Usually this means the conductive contact on the back of the rubber pad has worn down and cannot connect the circuits on the remote controls main board. There are several ways to fix this.

#1 Find some conductive adhesive or paint and carefully paint the back of the button tab ( let dry completely)

#2 Rear window defogger kits are available at most reputable auto parts shops and contain a paintable adhesive which you can apply to the back of the remote control button.

#3 try super gluing a small piece of aluminum foil to the back of the button tab.

I have used all 3 and they all work good.