CDJ 1000 mk3 Buttons mixed up?!

Recently my cdj 1000 mk3's cue button started playing up, quickly followed by the rec mode and track search buttons. Often they switch functions (e.g. cue button skips track, rec mode = cue, track search forward = reverse etc). This has happened before and I re-updated the firmware (v 2.30) and it seemed to work but didn't last long and now the cdj won't recognise the update cd at all (I've tried fresh DL's and different copies of the update iso)

Any help/info would be greatly appreciated!