UKC is the obvious place to ask this question- can't think of anywhere better!
I have an electric guitar which has stopped making any output at all.
On inspection there are two small wires soldered to the jack socket- one has become detached and will need resoldering.
Quite finicky work - not one for somebidy with a huge industrial soldering iron perhaps.
If there's anybody out there I'm sure we can come to some arrangment re beer or something