So I have a Marshall MG15FX, 120v (I believe) Amp that has a faulty headphone jack. As you all know when you plug headphones into an amp it will mute the amp speaker and direct the sound through the headphones. My problem is that my amp is stuck in this muted mode even with no headphones plugged into it. I was able to get normal sounding noise to come out of the amp if I plugged headphones in and held them in a particular spot, so I know the speaker is working fine.                                           I honestly just want to get rid of the headphone jack since I rarely used it and when I did it messed up my amp, and replacing it seems like too much work for a fairly cheap amp. How would I go about manually unmuting my amp and removing the headphone jack? I've never worked on an amp but I'm guessing if I just pull the jack out it will remain silent. Any help or advice would be greatly appreciated.