[TheMAXX]

Did you change the cable that is feeding that input? I know this is basic but I have found that sometimes I get so close to looking at a problem that I make a very basic mistake. We had what we thought was a bad channel coming from a keyboard but it turned out that someone got into the keyboard settings and boosted some of the output channels and it was causing distortion on the outputs of the keyboard itself. I have also had a bunch of bad channels on a snake in an installed system that threw us off for a little bit.

If you plug a mic directly into the input does it still have the problem?

I think Avid has an exchange program where they send you a new part and you send them back the old one after you get the new part. I think that they charge you for the new one and refund some of that when they get the old one back.