anti-parallel led testing

[Dimitree]

hello,
with my multimeter I was testing 2 leds arranged in anti-parallel in the loop of a non-inverting opamp.
one of the 2 leds lights up, the other not (of course inverting the DMM leads on it).
is that normal or can I assume the other one is gone?

[Digital Larry]

I'm surprised your DMM puts out enough current to light up an LED!

[DDD]

DMM's test voltage is enough to light up a RED Led, but not enough to do so with another colour LEDs.
Hence you can assume that one of your LEDs has gone, or it is just of another colour.

[duck_arse]

testing on the ohms range obviously. what was your meter reading on the lighting led, and what was it reading on the non-lighting? the difference may well have been that part of the circuit not in the loop.