Strange issues with ddj sz

I have searched the Internet high and low and cannot find a single thread with the same problem I have with my sz. It has worked flawlessly for years and the last few weeks iv had an issue where I switch the unit on and it does not power up properly, just one light on the master volume lights up and the fx 2 knob at the top of the unit. After re flashing all firmware and downloading updates for serato dj the unit now powers on but is not working properly at all. Just a few of the issues are, the cue button now skips back a track instead of cueing. The play button acts as a cue button but does not actually stop the track. Neither of the pitch faders work at all. They are just locked at the tracks set bpm. None of the looping buttons work and the volume faders now start the track when you raise them above zero volume. Also non of the cue pads are responding except for the slicer. I'm pretty sure my unit has had it, iv tried every reset possible and nothing seems to work. If anyone can help it would be great. Thanks alot