CDJ-2000 cue button issue

Hi,

I have a pair of pioneer cdj-2000 s, recently their cue and play buttons started to loose their sensitivity (like i had to press few times to get them to work).I have replaced the switches on the cue pcb and 1 of the cdj started to work perfectly fine but the other cdj's cue button gone completely (play button works fine) so i have replaced the whole cue/play pcb but still no luck with my cue button.

Any Help would be appreciated.

Thanks in Advance