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@le_james
My IQ-X has just died. It was fine on the way to work (daylight, but a colleague commented on my lights when I arrived so I know they were on), but when I left in the evening (dark) no lights.
Dynamo is reading 18v AC when I spin the wheel with the bike on the stand. Rear light tails get 0.3v (AC, but I wonder if that should be measured DC). Doing the button doesn't seem to do anything.
Time to order a new light? Or is something up with the dynamo and it's killed the light?