The way it looks i am going to have to trash my Yamaha S-90 because the repair is way to expensive .Its only about 9 years old but it looks like the main board is useless.I would think that all keyboards that use 'mother boards' would go bad in about the same amount of time.Isn't this a fact of life? I didn't think of that when I bought my S90.I was just somewhat naively thinking I would have a keyboard for life with just some affordable repairs now and then.I was terribly surprised when told that it might need a new main board which i read cost about $1000 and that after only about 10 years!Any comments?