Official comment
Hello Steph,
DDJ-SR engineers would like to ask you the question below:
Did you have the issue you reported after updating which firmware version?
If you have this kind of issues without updating the firmware, it would be caused by faulty hardware. We recommend you send the unit to a service center near from your place.
Sorry for the issue you have and thank you for your kind cooperation.
Best regards,
CRM, Pioneer DJ