Beakybird:

I'd put my money on Gary's explanation and solution. The only other thing I can think of might be the mainboard with hairline cracks. Difficult to find and nearly impossible to repair. I would check out Gary's approach first before scrapping anything.

Quality control problems are not unique to Yamaha. Just remember the brand new car somebody bought recently that was assembled on Friday (or was it Hangover Monday?)and had such a host of problems.

Please keep us posted about the final analysis and solution. Who knows, my old 2000 may be next.

Thanks and good luck.

Dave Rice http://cdbaby.com/cd/daverice