scratchy noise when plugged into my TU2

[fr0me0]

I get this scratchy noise when I plug in through my TU2 tuner. I've swapped out cables and it still does it. any Idea what might cause this? Is it safe to open it up and poke around or should I just send it it?

[bassicinstinct]

Does it still happen when you mute?

If not, there's your answer.

If it does, it beats me I'm afraid.

[Jazzin']

Battery low?