This beautiful 1989 Gibson L4 CES was brought in with a bad electrical buzz.
I traced the buzz to a disconnected bridge earth wire which I reconnected.
I noticed however that at some point early in its life the guitar had been rewired with different pots. The pots have solid shafts and whoever did the work thought it a good idea to glue the knobs to the pots!
Who in their right mind would do such a thing to an expensive (or any) guitar is totally beyond me!