Steve Anderson wrote:I'm not sure about LEDs, but most semis generally go short or low-resistance when they fail...that is when the failure isn't the result of an over-volts/current/power.
If these two are from amongst the 1500+ in the Niptrix it's simply a case of Infant Mortality, a failure rate of 0.13% (so far).
Steve A.
Thanks for that info Steve and yes, they are in the Niptrix.
Fortunately the layout I settled on is such that replacing any LED, although a bit fiddly is quickly done........So I daresay I may have some more violin playing to do from time to time.
The puzzle for me was that a partially shorted LED caused ALL the other LEDs on that line to go partially ON too !!
It has taken me ages to get yet another Niptrix penny to drop.
“One small step for a man,"......because he has Arthritis.
Albert.