Yamaha PSR6000 - G key doesn't sound

Hello, sorry to bother you, but i have a problem.

The G key of the fourth octave (44th key) of my Yamaha PSR6000 keyboard does not sound.

Could you give me some indication on what can be done?

Many thanks.

Ale from Italy

Most likely the rubber contact is fault. Probably a good idea to change all the contact strips.