I’m also having a similar issue with the JA board testing. When actioning button presses I don’t get any response or any feedback in MIOS Studio but if I move the encoder a few clicks I get most of the LED lighting up (bar 2 that I need to replace)
I checked that the IC’s are the correct part no and also correct orientation. Tried cleaning the board with 100% isopropyl which seemed to make the board dirtier if you know what I mean.
Any ideas on what to look at next after I replace the two LED’s that are not working?
Thanks in advance for your assistance