I'm not interested to fix the led lights as this is too expensive to repair and it does not cause any problems whilst djing. The headphone cue buttons still work although they have no light.
The problem I really needed to fix which you do not mention or quote for is the right side deck Hot Cue button. Bottom right corner is stuck. So I cannot load any cue points from my music because the stuck button is causing constant looping the sound.
If you cannot fix the Hot Cue button then I will come to collect the DDJSX today before you close.