Hello all. I recently got a Porta 07 and when I flip the switch to remix mode channel 3 is very faint. It records in fine and in cue mode it playbacks good but in remix mode it is so quiet I have two turn it all the way up and it's still barely there any suggestions on what the problem could be? Has anyone dealt with this before? I opened it up and don't see anything obvious like burnt components or shorts. I have a multimeter and know how to take readings and also know how to solder just a little unsure where to start. Thanks!