kontrol s4 top, upper fx LEDs going off and on, not working

so recently my leds on the top, (the fx leds) started going off and on and off i mean they go off and come on after a minute or two and the go off randomly, the blue led master meter also came off when i was in the club last time playing, here at home only the leds play crazy. now the blue master meter is always on but the leds are not and something they flicker on startup and the master meter also

my system is latest mac Yosemite latest drivers and everything else works fine
kontrol s4 mk1, tried under windows its not software -.-

maybe some info on opening and repairing by my self are the leds attached to the motherboard or is there something a can fix that becomes loose or something if anyone who opened the kontrol s4 has info ?

THANKS