If you don't want to mess with replacing things, get a good magnifying glass and a sharp pointed object. Look into the jack with the glass and see if you can spot pins touching. All you need to do is move them apart so they don't touch. Don't worry about making it look pretty. Obviously, do this with the power off.
If you do decide to go the route of replacement, chances are that's just a common jack. You'll need to identify it but Mouser / Digikey / etc. will most likely have something similar since the footprints are almost all the same regardless of manufacturer of the part. Just be advised that Pis tend to have lead free / low lead solder that doesn't flow worth a shit and looks terrible and will result in many people being put against the wall and shot when the revolution comes, no quarter given or questions asked.
Ironically, what would put lead in them.
Solder is traditionally a 60/40 mix (60% Tin, 40% Lead.) Because lead is bad bad bad you're gonna die, some manufacturers - especially in the cucked EU, specify 95/5 Tin/Antimony solder which looks like shit and flows like shit and is generally shit. It has other issues, but the biggest issue is it doesn't flow well and can give you a terrible joint. 60/40 solder is best, although some heathens specify 63/37 types.
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