Disclaimer
Use this at your OWN risk, do NOT sue me if it breaks your board... if your doing this your board is probably already broken though ;)

Problem:

Sound is weird.. actually sounds fine unless you know what CC is supposed to sound like. CC has 2 distinct sound channels mixed together to end speakers (both speakers play both channels, they are NOT wired seperately). Only 1 channel of sound is working.

Troubleshooting/dianosis steps:

1. isolate problem: verify that it's not the AR II board, switch pins J8 and J9 (Brown and white) on the ARII board (you need a MOLEX PIN remover), make sure that still sounds the same. if they sound different... it's probably the ARII that needs repair, rebuild it.
2. isolate problem: Verify POKEYS (locations 3B and 3D). Swap them to make sure everything still sounds the same, if now the missing sounds are back, but you have have different sounds missing, pull one pokey at a time to see which one is bad and replace.
3. final step (if not either of the above): replace LM324 chip at location B5. This is the only major IC between the POKEYS and the ARII board. (This was my fix)