Problem with Start/Pause Button and edit grid

I am having problems with right hand deck (2/4) load the track press to play, flashing green light goes to solid green but nothing happens. I have also noticed that the colour on the jog wheel at times keeps flashing when track is loaded. If you catch it when white this is when the track will not play and you can’t edit beat grid. If it stays on set colour it will play and you can edit beat grid. I have done everything that support have suggested factory reset, reload to 1.5.2 and still no repair.