Ketron acknoledged a problem with the SD1's display a few months ago and a fix was initiated which required a soldered board rather than a socketed board. Any SD1 requiring this repair I'm certain will be taken care of by Ketron. Since the problem was isolated to the display and Ketron was able to identify the problem, I've not had any problems with any of the new boards arriving from New York.
George Kaye
Kaye's Music Scene
Reseda, California