My Kemper has started making this hideous noise, sounds a bit like white noise combined with very loud digital distortion. ill attach an mp3 file of it. This started happening a few weeks ago randomly and after a few minutes it would go away and the kemper would work. Now the noise is permanently there. With nothing plugged in except the power lead and a set of headphones. If I plug a guitar in it will combine the noise with the guitar signal but the noise is extremely loud and the kemper is unusable. This kemper is 4 months old and i purchased it new, non powered rack version. Ive restored to factory and also updated to new operating software. Any help much appreciated
thanksKemper noise.mp3.zip