I've been gigging with a Spirit and after getting through a two hour gig on Saturday night, I coiled it up and put it in my gigbag. Got home, plugged in on Sunday and it's just dead. Never had that with a guitar lead before. I've had them become crackly but never just die. What do I look for in the jacks? I'm a noob when it comes to guitar leads but the straight jack *looks* fine. How do I actually disassemble a right-angled Neutrik jack to look inside?