Yamaha PSR 225 - the g and f sharp on each octave do not play. ?

My Yamaha P-200 sustain pedal function is 'sticking'?

how can I fix my Yahama Clavinova CVP-209?

how can I fix my Clavanova CLP-950 two keys make no sound?

How can I fix my Yamaha Clavinova CVP-55?

How can I fix the back-light in the LCD screen in my Yamaha PSR-630 keyboar?

Yamaha HS-8 sofware?

Ettor code in cvp 209?

fix speaker?

yamaha keyboard PRS-70?

How can i fix my yamaha keyboard, PSR 270?

Yamaha P-200 Stuck notes?

Why do yahama use plastic key boards when their products are so expensive?