I took my brother's Warwick into my local shop for a set up, as I noticed that there was more of a neck bow than normal and the action was uncomfortably high and it was playing sluggishly. (it's a Streamer Jazzman). A week later when they got round to my bass, they phoned to tell me that the truss rod wasn't doing anything, it just wasn't reacting, just rotating on the spot. He remarked that it looked like someone had used an alan key on the thing, but my brother and I haven't touched the truss rod or made any real adjustments since he bought it from the shop in 2003, who incidentally were responsible for the initial setup. I don't know what to do - it's a gorgeous instrument and clearly I'm not responsible for the problem. Could it just happen on its own? The instrument is in perfect condition in every other way. The guitar man said that he'd talk to Warwick and they might fix it under warranty for me but it's not certain. I'm clearly gonna fight my corner, since it wouldn't be fair to have to pay for repairs. If it did come to costing me, how much would it be? And what is the warranty on a Warwick like that - we have the receipt but I can't seem to find my brother's initial Warwick paperwork. Many thanks for any advice. By the way, I bought a Line 6 Lowdown bass amp a few days a go and it's awesome. A lot of growl for 150 Watts and cool effects. I just wish I was playing my Warwick through it lol instead of my beginner's oooold Yamaha.