| Just FYI, it's an output jack.
Two things....
1) Your jack is sprung. Get inside it and bend the contacts back into place.
2) Don't plug directly into the jack. Loop the cable through your guitar strap first so that nothing pulls against the jack - which is how it got sprung.
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"The best way to tell a lie is to tell the right amount of the truth, and then shut up." Robert A. Heinlein
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