Today I bought a Golden Sun The Lost Age cartridge for 5 bucks. The game is used and it has a problem. The thing is it doesn't work, so I bought it thinking the issue could be repaired. When I put the game in a GBA SP, sometimes the Game Boy Logo has the word Nintendo like glitched. Sometimes it works and then I get a weird screen, not from the game. It's looks like those chocolate bricks from Super Mario Bros. Now, I borrowed a triwing to a friend, and I opened the cartidge. I also have the first Golden Sun game and I compared both chipsets, and they are very similar, which is more than enough proof (beside it's game label, Nintendo original plastic cartridge, etc). What I want to know is how can I clean the chipset or even better, identify the possible problems, so I can make the function. The guy I bought the game from, said that he had a gba cleaning kit in which he put the cartridge, and then it made the game work. So the game has been seen to work, but I don't know how I can fix it. MAJOR EDIT: I used a toothbrush to clean the board and chipset, and now I don't get the glitched Nintendo logo or those 'chocolate bricks'. Afer the GameBoy/Nintendo logo loads fine, I get a black screen. Dang, it's like it's about to boot. Any help, please?