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Yeah, he shorted out a buffer chip on the PC interface board. The hand controller and the PC interface use the same data line to the control boards in the mount and when the buffer blew up it tied that line to ground, so even the hand controller stopped working.
I bodged it for a while by cutting the blown up IC off the circuit board and only replaced it when I found I could get a new one for a reasonable price in Australia.
Spoiled a nights observing with a mate of course!
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