Once you find a working code for power, to get the volume which never works initially with any audio code. With a tv code in, or the volume keys won't work at all, to get the volume in single device do the following:
1. av1 or av2
2. press and hold MUTE & SELECT, wait for two blinks, release
3. enter 9 9 3
4. press VOL DOWN
If you want the rca volume in ALL devices, do the following instead:
1. av1 or av2
2. press and hold MUTE & SELECT, wait for two blinks, release
3. enter 9 9 3
4. press SELECT