Larry...
I am sincerely happy for you in a couple of ways: 1. You have got to the root of the problems that throw fear into the hearts of all of us who rely on these instruments for our bread and butter. 2. You got a positive and helpful response from a Yamaha rep (Steve), and 3. You uncovered some errors on your own part, which we will all learn from.

A friend has expressed interest in buying my 740 and if he does, I am seriously thinking about getting another 2000 as backup and for practicing at home.

Putting the OS confusion and chip hassle aside, my only worry is the construction and durability....but otherwise, I am extremely happy with my PSR 2000.

Thanks for keeping us posted.
Hi Steve or whoever is lurking from Yamaha.

Eddie