How to mend Key Electronic Buttons

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

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

Technics Digital Piano PR370 sound problem?

How can i fix my yamaha keyboard, PSR 270?

How can I fix my Yamaha Clavinova CVP-55?

korg c 15s service manual?

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

Sound Name Error on Technics Pr902 Piano?

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

Hissing Sound?

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

Technics SX-PX554 no sound?

Technics PR602 replacing the disc drive with hard drive?

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

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

Ettor code in cvp 209?

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

fix speaker?

need new cord?

Electric piano with clicking keys ?

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

elka x30?

yamaha keyboard PRS-70?

How can I fix a keyboard with dead keys. ?

No sound?

Technics SX-PR603, edelp for repair?

wrong plug?

Rec Mutipal tracks of music MD 4072?

Need a main board for my pr370?

my piano soft pedal wont work?