I’m frustrated

loose connections on headphones and line in 3 and 4?

I feel like there is something out of alignment in the Line in 3 and 4 on my MultiMix 4 usb unit. I sometimes have the same issue with the headphone jack depending on what 1/4" adapter I use. To get the full sound on the line in 3 or 4 and also out of the headphone jack I have to put the jack in only half way in to actually get stereo sound. And even then I sometimes have to play with it to get it just right. I thought it was just the headphone jack as I had not yet needed to use the line in inputs until now and realized they did it too. Is there something I can do to fix this?
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