most later Elektrons have a test mode which specifically tests the device on LED status, and for different colours when possible - it’s visual and obvious
Maybe test mode is smart enough to know/report - but if there’s a similar LED check mode on MNM give it a try - just in case your issue is somehow related to something else (although unlikely)
all info for support
not sure how easy these are to source/remove/replace - might just be a slip on masking/sleeve and regular component - assuming issue doesn’t lie elsewhere - may be possible to test led with device off and a suitable DC voltage battery
screen grab from this photo
