Restoring the original gameboy - Retroration project

In this week’s project I will restore the original Nintendo Gameboy. As a 90’s kid I thought it would be cool to restore a Gameboy. Or should I say retrore. I bought this one from Japan. It’s obviously dirty but it’s also very yellow no rust this time. With this rust would be very bad. However the screen is broken and it is missing a lot of vertical lines. Otherwise it seems to be fine. I had some issues with turning it on when I tested it but after I got it on, I’ve had no trouble. The batteries I used wer