Transparent Gameboy DMG - Trying to Fix a dead console

Well.... there is a portion in this where I "Could" have just replaced the rear PCB with one I found in the spares box that works... I should have done that TBH. There WILL be a follow up to this one, at some point, as I am going to take the partially working rear PCB, the one from this that does not power on, and the test screen, and TRY to figure out what the problem is, but for now, I've just got this one working with spare parts that were lying around.