DDJ-SX Unstable master levels. Please help!!!

Hello everyone, I own a DDJ-SX that I bought a couple years ago. I used to use the controller at home with the TRS booth outs connected to my studio monitors. The problem started about six months ago, when the volume on the booth out would randomly just shoot up and down about 10dB and would crackle a lot at low levels. The problem kept getting worse to the point where the booth outs were unusable, so I started using XLR's on the master instead. Everything seemed to work fine until recently the same problem has started to occur on the master outs. Now because of this issue I have not been able to play out with my SX as the levels would just increase and decrease randomly, which is quite annoying. Please help as now I'm pretty much grounded without my controller.