Disklavier Question

[Farrell]

I am stopping by a client's home tomorrow to look at her Yammy grand with a Disklavier. I told her I only know a VERY little about them, but she wants me to at least look at it (heck, maybe I'll find a cord not plugged in!). She says the piano has been set up for two years, but only recently she tried using it. She says the keys go up and down when she turns a disk on, but the piano makes no noise (no music). She thinks it has the Quiet Time feature (which I know almost nothing about).

Anyone care to throw out a few things to look at? Thanks for any crumbs. 

Again, I know almost nothing about these things (give me an hour and a bottle of rum and I MIGHT be able to figure out how to turn it on!).

Terry Farrell