Please note; this forum is not the right place to find support with your Xone:92 mixer. Typically, for remote support, you can drop us a line to support@allen-heath.com where our Xone DJ will be happy to help.
However, your issue does sound like a hardware issue, so in this instance you may be better off going direct to our regional distributor in your country and book in with their service department. Contact details can be found via the Where to buy page and selecting a country.