Another update, and I hope I'm not boring you all, but it may be of some help.

I received two calls from Yamaha.(Steve and Elijah of Yamaha are unbelievably good with customer support).We agreed... Rather than ship the keyboard coast to coast, round trip, Yamaha is shipping all parts that could possibly be needed, to the store, to be installed by a certified Yamaha repair tech. And they are doing this at a cost that will drastically reduce the original estimate of the motherboard. The store has agreed to this. Both the store and Yamaha will not make money on this, but they both want this customer to be happy.

For Yamaha to get involved in a keyboard that is out of warranty, and is shipping parts at a reduced price...you can't beat that service.

And for the music store to acknowledge the mistake, and to work together with Yamaha shows me the store is truly sorry for the mix up. I appreciate that.

George,

Thanks for the advise, and can you open a store in Pa.?

Steve from Yamaha asked me to pass this on:
If a keyboard is out of warranty, contact Yamaha, and arrange for Yamaha to repair the keyboard. They fix first, and replace only if necessary. Unless you really know an expert, use Yamaha LA

Also a good point about a factory reset.
It's still hard for me to believe that while upgrading the OS, the motherboard would suffer a complete meltdown. There must be some safeguard built in that protects this expensive part. I'm no expert, but I heard something about the flash ROM, or a small circuit board that protects the motherboard...??

Dikki also has a great point...Homework is important with repairs, I know I have learned that in this ordeal.

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Larry
SynthZone Frapper