Issue with Lab Gruppen C20:8x – no output from channel F, fault LED illuminated constantly


Hi there, first post here.

I have a Lab Gruppen C20:8x and am getting no output from channel F. The CPL fault LED is constantly illuminated (orange) for that channel, also the VHF fault LED. This is irrespective of whether inputs/outputs are connected or not.

Can anyone advise pls? Feel free to ask for further info. Thanks in adv,