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Old 5th September 2021, 11:50 AM
Terry S Terry S is offline
Join Date: Dec 2011
Location: Southend on Sea, Essex, England UK
Posts: 2,822

Originally Posted by mpirie View Post
It is possible that the lamp holder contacts are getting dirty with corrosion where the pins make contact (or not) with the holder.

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
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