The continuing Cellar Car saga

[sexobon]

I take it there's no indication the stereo is powering up; yet, all of the other interior accessories are working.

Intact interior fuses makes it seem less likely that a power surge from a jumpstart fried the stereo; or, at least that the problem is between the firewall and the stereo (which probably doesn't have an organic fuse or reset button). I'd continue troubleshooting by tracing the fuse box wiring from the firewall to the car battery looking for a possible fuse link in the engine compartment wiring, an obvious disconnection or circuit breaking corrosion on connections. Before I'd remove the stereo and chuck it, I'd bypass most of the car's electrical system by pulling the stereo's fuse from the fuse box and connect an appropriate power supply to the terminal ends of the stereo's wires to see if it powered up.