Ok gang, I received a call back from Steve Deming this afternoon.

After a short discussion, he concluded that he had mistakenly got the impression that the flaky Tyros USB connectivity problem I've been experiencing, only occurs when I attempt connecting my Tyros to my PC via the Windows PC software: Yamaha 'File Utility' program, but that I was not experiencing any USB problems when connecting via Tyros 'USB-Storage (HDD) mode': initiated by holding down the blue MusicFinder button when initially booting up the Tyros. This is not the case. On my Tyros, the USB 'erratic connectivity' occurs no matter what method of connection I attempt to use (via 'File Utility' or 'USB-Storage Mode'), and I had thought I made it clear in my postings (both here and on SVPWorld, as well as in the email I sent to Yamaha USA.

To make a long story short, Steve Deming 'now' tells me that there's been a Tyros 'hardware fix' for my specific Tyros/PC USB connection problem for several months. Though the hardware fix doesn't correct the problem when connecting via the 'File Utility' program, it DOES correct it when connecting via 'USB-Storage (HDD) Mode'. This hardware fix consists of replacing the USB Port board on the Tyros, as is the the exact fix 'Elcanal' (SVPWorld forum member) outlined several months back on the SVPWorld Tyros forum:
http://www.svpworld.com/forum/forum_posts.asp?TID=3098&PN=1

I'm elated to discover that there's finally an official Yamaha Tyros USB hardware fix available, at least via 'USB-Storage Mode', but it's annoying to discover that this fix has been available for quite some time now (several months), and that the long delay in discovering this, is primarily due (?) to Mr Deming's misunderstanding that I was only experiencing the problem via 'File Utility' mode.

I plan to call my local Yamaha repair facility tomorrow and schedule a USB Port hardware replacement, of which incidently is covered under Yamaha warranty. Unfortunately it looks like I may be without my Tyros for quite some time (up to 2 weeks?) and will have to borrow my friends PSR2000 until my Tyros is repaired. I promise to keep you all abreast of developments.

Scott

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http://scottyee.com