No, I am not convinced that problems appears instantly. In fact, when I was having problems with the sevo that was causing things to overheat, it took a little time .. , which gives you enough time to unplug things before it fried.

yes, when I had the crash and smashed the diode on the tail, that was immediate death.

I would check again and see if the servos etc are working right.
That's my 2 cents.