I have an Ibanez 5 stringer SR405. When I took it out of the case to tune up for the church gig this Sunday the volume pot was dead. Only a slight scratching noise when turning. Last time the bass was out of the case was at rehearsal this past Tuesday , all was fine when I put it away. Took it home ... it sat in it's case until I took it out this Sunday. It's not the battery, I had a new one in it, and changed it out to check to see if it had drained down. Can a pot just go bad overnight? This bass is clean and is well taken care of. No coffee or soda has been spilled around it. JUst rying to get some education on this issue before calling the guitar tech this morning. Thanks.