Hey everybody,
I just bought a MIM strat on craigslist but when I select the bridge pickup it's very quiet and when I select the bridge and middle there's no hum cancel and it sounds almost exactly like the middle alone. All the screws and strings look like they've never been touched. I tried to adjust the pickup height but it made no difference. It's still in warranty but I don't have the receipt and the warranty is transferable. Anyone know what could be wrong with it?

Thank you for any help!