Yellowed Nintendo NES restoration and repair. Whats inside this one

Restoring the original Gameboy got me really interested in restoring and repairing more of these old gaming consoles like this Nintendo NES along side with the knives, tools, etc. I might move into other old electronics as well. I havent really done much this type of work ever but with every project I learn and get better. For the disassembly I used a Phillips screwdriver, except for the screws on the top half of the shell. Those had a weird type of screw that could still be opened with a flathead. There was a pit in the middle of the slot, so the screwdriver would be a flathead with a spike in the middle. I have not seen those before. No real trick here. Try to remember which screw came where, or film it like me. And dont loose the screws Removing the controllers and buttons cords from the board was much harder than it looks. I probably spent 2 minutes just wiggling them from side to side until they came loose.