follow up to my last post; my first successful repair! thank you to everyone who helped me out in the comments. it took a long time, but those lines are finally gone! :
Nintendo Game Boy Color originál Japan (modrý) - Praha - Sbazar.cz
Gameboy advance SP (limitovaná edice) + 5 her + 2 nabíječky - bazar - Hyperinzerce.cz
Amazon.com: Nintendo Game Boy Advance SP - Platinum : Unknown: Video Games