Quote:
Originally Posted by mpirie
It is possible that the lamp holder contacts are getting dirty with corrosion where the pins make contact (or not) with the holder.
Mike
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This is a good suggestion by Mike, as I had similar trouble to the OP, but mine was with batteries in a flash unit where some worked first time and others didn't. A good clean with one of those tough ended photo brushes sold for this made all the difference and after using the brush, ALL batteries worked with no problem!
Terry S