2013 G23 - No sound in the cabin speakers

[mysapman]

I have been trying to resolve an issue and was looking for someone with much more experience with audio systems than I do. I purchased a used 2013 G23 about 3-4 months ago. I started having issues with the front right speaker not working. Then I noticed one of the AMPS didn't have a power light. I am pretty sure it is the one that controls the sub and speakers in the cabin. The tower sound is working. I replaced the AMP with the exact same unit. There is still no sound in the speakers. The power to the unit is on. There is just a little bit of sound coming out of the sub. I swamped the RCA's around and the tower works with either, so I am assuming the head unit is sending a signal to the AMP. I looked at the balance and fade, it is fine. I have played with the switches on both AMPS, so I don't know if one of them is wrong now. Suggestions and ideas?

[MLA]

Need to confirm the RCA to the 5 chnl amp are plugged into the amp/chnl 1 LEFT and amp/chnl 2 RIGHT. Input mode needs to be set to 2-chnl. Basically, mimick the settings on the old amp to start with.