Third post in a row is a charm.

Dumped the bin file and compared it to a bin downloaded from the internet. (Now whether there's a header inserted in the latter I don't know,) but my bin won't run in an emulator, and when I opened it in a hex editor it was comparable to the working bin but not exactly the same. Some graphics could be seen in Tile Layer Pro, etc. But it confirms my suspicion: somehow the chip was corrupted, probably from static discharge or shock.