Game Gear Power Audio Motherboard Cables

A common issue of the Game Gear consoles is the old, twisted audio and power cables that join the motherboard to the power and audio boards become damaged, corroded, or partially broken so only work when in a very specific position.

If you are experiencing no boot, random glitching, no audio, crackled audio, failing to boot sometimes but working others, it could be your cables. It could be many other things (Checkout RetroSix.wiki for much more info on Game Gear repairs).