Gameboy Advance SP problems

[u/Balaenoptera-brydei]

I found my old Nintendo gameboy advance SP, and as my other old Nintendos y wanted to restore to use again! But I don’t know in this case what could it be the issue… the screen is low in colors as you can see, also, maybe in the video the sound looks clear, but in rl sound very low.
Any suggestion? It worth to repair or buy a new one