X1800 mixer internal buzzing and sound distortion

Good luck. The same thing happened to mine which is out of warranty as well. I contacted Denon support and all they did was send me a PDF of the recommended service centers in North America.

From looking around the forum it appears to be a very common issue with this mixer. I posted my own thread here, with links to other people experiencing the same issue: [COMMON ISSUE] Sound distortion, internal buzzing