Answer to: Sega Gamegear won't work.Searching for answers on what needs replacingYou need to replace the capacitors inside the game gear. there are 3 boards that they need to be replaced on. The power board, the audio board, and the main board. Its not difficult, but time consuming since you have to remove the old capacitors, clean the solder pads, and solder on new capacitors. Search online for capacitor replacement kits. You will need to know what revision your game gear is, this is located inside the case of the game gear printed on the mainboard.