Electro-Conductivity?

[Flashie]

Hi

 

Im working on my fathers TV Decoder's remote because recently his been complaining that the Exit key does not work. I cleaned off gunk from the circuit board. I tried to draw over it with a pencil to try and get it to conduct and read that its being pressed but that did not work out great. I have no clue whats happening from here on. I already looked over the circuits with a very sharp lens so i can see fractures in the circuit pathway, but there are none. The Info key shown in the pictures work fine, and the exit key shown in the pictures, does not. I'd appreciate if someone has any tips to fixing this. Sure i can buy him another remote (which his already done) but this one is discontinued, and is more comfortable than the newer model. I've also shorted out the exit key's pathway using a screwdriver, and then it registered the push, but doing it with the rubber button, does not. I'd love any tips to solving this, Thanks

 

Exit Key (Not working properly)

 

 

 

The Info Key