Ok this is very very strange. I've been working on a gamecube and finally today I put it back together. All of the connections are secure and in the right spot, but for some reason there is no audio. All of the wires are connected firmly into the tv and the back of the gamecube. My A/V cables are special ones that work with xbox ps2 and gamecube (there are 3 seperate connections for each console). I tried the ps2 cables in my ps2 and they work fine so im pretty sure its not the cables. I took it apart and put it back together and still no audio.
The only thing I soldered was a new led. I took out the old power one and replaced it with a blue one, and theres no way that caused it. I dont have spare cables to try but does anyone have suggestions.