How to mend Key Electronic Buttons

technics pr902 popping and screen blank but lit. Any ideas please?

Sound Name Error on Technics Pr902 Piano?

Technics PR602 replacing the disc drive with hard drive?

Technics SX-PR603, edelp for repair?

wrong plug?

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

Technics Digital Piano PR370 sound problem?

elka x30?

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

korg c 15s service manual?

How can I fix a keyboard with dead keys. ?

Technics SX-PX554 no sound?

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

Need a main board for my pr370?

Electric piano with clicking keys ?

How can i fix my yamaha keyboard, PSR 270?

Ettor code in cvp 209?

yamaha keyboard PRS-70?

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

How can I fix my Yamaha Clavinova CVP-55?

fix speaker?

No sound?

my piano soft pedal wont work?

need new cord?

No sound when I play my Technics SX PR170 digital Piano?

i have a ROLAND RD-150 with tow keys with no sound, can i fix it?

My top Bflat on my Roland 4500 piano has suddenly ceased to work?

How can I fix my Electric Roland Piano - notes not playing?

Rec Mutipal tracks of music MD 4072?

Hissing Sound?