Plug in a cable to the output jack and test. ... If the noises are still there, check your solder connections and try a different cable. If you hear nothing, the output jack may need to be replaced. Or there is another part of your bass causing the problem, such as bad wires or a bad pickup.
Why is there no sound coming out of my bass?
Another common cause of bad sound or no sound is an issue with your cables. ... Test out some different cables if you have them and you could have an easy fix. Bear in mind, because bass (and guitar) cables are unbalanced, they will pick up noise disturbance from other electrical equipment.