Hi Intely ,
Please try the following measures to solve this issue.
1. Disconnect the power cable, then wait for a minute to connect it again.
2. Update the firmware to the latest one from the link below.
http://pdj-ecom.trafficmanager.net/en/support/software/cdj-2000nxs/
If the unit still does not work even after trying the above measures, please send the unit to the service center for repair or replacement.
Sorry for the inconvenience and thank you for your kind understanding.
Best regards,
CRM, Pioneer DJ