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Led lighted aracde buttons issue - dud leds?

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RandyT:


--- Quote from: swamprat96 on July 23, 2010, 12:27:31 am ---Resoldered the joint and metered out both the resistor (550 ohms) and checked the joint. No change. Weird.

--- End quote ---

It's possible that someone had already mistreated these with too much current and they are on their last legs.    I agree....weird.





zafdor:

I agree that this looks like a hack job on the connections.   You can test the LED element with multimeter, some even have a diode (which is the 'D' in LED) setting.  In one direction the LED will probably read 1.5V or so on the diode setting and something other then open circuit on ohms. 

If it is connection related, start with the red meter lead on the + wire and meter set on diode.  Move to each of the connections towards towards the - lead, when you hit a point where you read open ciruit, that is where the connection problem is.

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