>>>> "Jules" == Jules Richardson
<julesrichardsonuk(a)yahoo.co.uk> writes:
Jules> ...I'm totally confused by that - the sensor showed no signs of
Jules> dirt. It hadn't worked in place in the drive, and nor did it
Jules> work in isolation on the bench at first. Yet it showed signs
Jules> of *some* life when originally in place within the drive, so
Jules> there obviously wasn't a cable break.
One guess would be a dirty connector. Unplugging and replugging can
rub off oxide that may have accumulated over the years.
paul