hey Tony. Strange. What OS version is currently installed on your Tyros? To check the OS Program version, select:
Function > Utility (I Button) > Owner Tab
Press & hold 'owner name' (I Button) and OS 'Program Version' should appear. The version (current) should read: 1.40. If not, download & upgrade to version 1.40 here:
http://www.yamahapkclub.com/tyros/download/os_ver140/os_verup.htm Because of the problems with the USB connection itself, I suggest installing via floppy disk method (as outlined in the documentation link). I think upgrading to 1.40 may solve the USB problem, but if not, you may need a Tyros USB port replacement performed by Yamaha, like my Tyros needed. If yours is indeed a Tyros USB port hardware issue, Yamaha will replace it (even beyond the warranty period) as it's an official acknowledged by Yamaha issue seen on some earlier produced Tyros. Tony, keeping my fingers crossed that updating to 1.40 will solve the problem. Good luck. In the meantime, hope to catch you on Skype, perhaps tomorrow (Tuesday). - Scott