re: My guitar crashed...

Care to share a few focused, large photos of the cavity from multiple angles? Remove the three screws securing the Model 5's control plate, you won't hurt anything removing that plate. I won't be able to see the inside of pots and stuff like that, and the jack's solder contact points may not be visible, but I can look for obviously detached hots within the circuit.

I've read the OP several times, and I'm still leaning towards a compromised contact point in the "hot" path of the circuit due to a failed solder joint. The hot out off the selector switch; hot in or hot out on a master volume or between two volumes for each pickup; or the hot to the jack is my guess. It could very well be a component failure but pots, jacks and switches tend to give warning signs prior to crapping out.