Yamaha DGX-660 Review: Not Just a Digital Piano

This is the Yamaha DGX-620 that I purchased in Thunder Bay last month in 95% running order. The main display screen needs to be serviced or replaced, and it appears that one of the data ribbons have become loose either from being knocked over or falling. All the keys and functions work. The weighted keys are noisy, which suggests the felt needs replacement. I was able to find a 12V 1 A power supply to run this piano, while I have ordered in a new adapter. The sound from the built-in speakers is