One of my rear speakers (M60's) developed a hiss recently. This has now been repaired and I have been trying to set up my system again but I am getting no sound from the rears.
In an effort to try & locate the problem I retyped the 568 from 5.0DDA to 2.0A using the front panel and connected the M60's to the analogue fronts (leaving the DSP connections alone). On selecting LD (my mac airport input) the 568 selected Trifield as the preset and sound came from the front three (DSP) speakers........still not from the M60's.
Whilst the speaker was being repaired a friend came round and played a movie through his tablet into the edge, there was a problem with the power supply to the tablet, resulting in two loud cracking noises through the M system.
Is it possible to blow the analogue part of the processor, leaving the digital part intact?
Is it correct to get sound via DSP's when the unit is configured for analogue outputs only? If not could this be a firmware issue? I am running the latest beta version.

568.2mm, DSP6000, DSP5200HC, DSP33 rears, HD621, LG G3, Sony UBPX800-M2, F80.