Not sure what you've tried in the last 4 f**ken pages lol, ain't no way I cbf reading this first up on a Monday - but as above, have you checked the CAS at all? It's just as unlikely as any other part you haven't touched recently coincidentally failing, but it fits the symptoms (battery fine, car started fine, ran for a bit then died, now won't start).
I assume you've gone over fuses by now?