Turns on but then nothing

Hi, I have just bought a 1989 Gameboy DMG-01 in Hong Kong for dirt cheap. When i put batteries inside, there is one sound, red battery light is on and there is something on the screen. It looks like some black stripe going down on the screen I guess it's a logo. Then it shows something looking like chinese characters. The game I got is super 28 in 1. And than it stays like that, no sound, no reaction to pressing buttons, nothing. I would be really happy if I could fix it, looking forward to your tips, thank you.