JAMO 200 Subwoofer LED Status Light Fault

Hi

The status light on the front of my sub no longer illuminates, otherwise the sub is working OK. Its a mini bi-colour LED. I have measured the voltage across the white connector on the board where the LED plugs in to and get -0.6v in standby and +0.6v powered on. I have removed the LED and tested it in diode mode with my multimeter; I don't get any readings. I have a spare mini bi-colour LED which tests OK on my multimeter (lights up) but when connected to the LED output on the sub I get nothing (presumably because the voltage is too low?)

Am I right in thinking the voltage is too low for this type of LED and what are the likely causes for this - anything a novice like me can investigate/fix? There seem to be lots of surface mount components around the connector, not sure I have the right tools or expertise to test any of these.

Any help/guidance gratefully received (please note I am being careful and staying well away from the high voltage side/caps etc..)
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