Nintendo Gameboy Advance SP Pokémon yellow best read desc

Product Name: Nintendo Gameboy Advance SP Pokémon yellow best read desc
Unit best charges fine turns on but won't go past the load screen if a game is in it it initially recognizes the game but just gives me a white screen after won't load the game. Pokémon yellow was tested on a Game Boy color works fine on its own so I know it's not the game and it also has a continue on it. If you know how to fix it then this is perfect for you at a decent price.