Hi Mark, thanks for checking your players.

Maybe i have burnt out some tracks somehow. That could be possible with the front ground, but I find it is strange that the AUX ground has also failed as I have never had this connected to anything.

Hugo- do you have a copy of the mk2a PCB design that would make it possible to see if a burnt out front ground would also take out the aux ground?

Also, my front amp is a Rockford with floating ground inputs, so it wouldn't seem unlikely that the empeg could ground through it.