By time, the audio on the Sega GameGear get guiet and it’s hard to hear anything. This can easily be fixed by replacing to capasitors. I used the guide found at SMSpower.org, and it works great. I made my own guides based on my experience, and it can be downloaded (not avaible yet) in PDF format. I’ve also made a video which can be found on YouTube.com, or you can wathc it bellow.