There are a few others out there who seem to have figured this out, that information can be found elsewhere. There are also a couple YouTube videos detailing the fix for this design issue. Some users have mentioned this issue to Line6 and apparently they will issue call tags and have you send the unit back to them to correct. One user detailed that when they personally took their unit in for the repair it only took a couple minutes. They also advised that they were not told what the fix is as the service center was authorized Line 6 and allegedly told the user they could not divulge what the fix is.
Whether or not the YouTube videos are actually showing what the true fix is remains debatable as there is no confirmation from any actual line 6 dealer or service center. Videos could be from techs who perform the repair but who knows. The repair performed does make sense when you see what it is but I would not suggest attempting this kind of service unless your unit is OUT of warranty or you have the skills, tools and ability to perform the correction. I'd suggest getting hold of Line6 and advising them of your issue and see if they will repair it for you.
Good luck!
