Yamaha PSS-680 No sound 
Any advice on how I could troubleshoot this keyboard would be greatly appreciated.

Background:
I recently pulled my old Yamaha PSS-680 out of storage ...

Replacement Power Supply 
Where can I get a replacement power supply for a pss-460 keyboard please

How to get music from my Yamaha PSS-51 to computer 
What do I need etc & how can I marry-up my Yamaha PSS-51 keyboard to my computer?

where to repair keyboard  
please can i know where to repair the keyboard model is pss 460

What's the difference between pss-460 and 470? 
I can't find a comparison anywhere and they look identicle....... plEase help! Thanks!!!!

Mint Yamaha PSS-270 but no sound. What gives? 
Hey there everyone. I have a Yamaha PSS-270 with case in absolute mint condition but there's no sound. I can turn it on, the display works, the buttons ...

Yamaha PSS 270 Manual 
How do I get the instructions for a 1990's era Yamaha PSS270 so I can hand it down to my young grandson?

AC Adapter for a Yamaha PSS 280? 
Where can I find a PA-3, PA-4 or PA-40 power adapter for my keyboard?

Random Buttons Cease to Function! Repair? PSS-170 
All the keys work great. This is a classic keyboard, but some of the coolest buttons just stopped working randomly.. all at the same time: Tempo-Up, Demonstration ...

Yamaha PSS-270 no sound 
I have had this keyboard for a while. It was always stored in the basement. Since recently moving, I wanted to try to get it out and play it. It powers ...

Yamaha PSS 51 problems 
Hi,
I am having PSS51 model and nowadays some of the keys like sound and voice selection,sound effect ,percussion,vector synth are not getting selected ...