Well, I checked for shorts with my multimeter, in continuity mode, and didn't find anything. I also re-soldered all of the joints that were the least bit questionable, and tested the screen, itself, using an Arduino. I'll include the pictures of the ATmega and the '244, here.





I also checked my solder joints with a loupe, and I couldn't find any bridges.

So, I am officially out of ideas.

Thanks!

- Alex