Burnt OEM Radio?

So there I was, dealing with crackly speakers that would sometimes not work at all and randomly turn back on. I dealt with it for a few months as I didn’t have the time to rip all my door panels off and replace speakers. One day after getting in the truck I notice a very prominent burnt plastic smell. I look in the engine bay, not there, get in the truck and notice it’s coming from the radio. Radio screen is now black and does not work. Everything else in the dash works (clock, hazards, airbag etc). Also, the fuse for the radio was blown. I disassembled the OEM radio and couldn’t find any clearly burnt components in the radio. Did a faulty short on a speaker cause my radio to blow up? Did the fuse not blow properly causing my radio to blow up? Why did my radio blow help? Your help is greatly appreciated.

 

honestly too many variables to even begin to guess.

get the radio working first, than approach the rest of the setup as needed.