I tested for power and everything works

As far as speaker connections. I'm not getting  sound out of the Subwoofer connection and the Surround R , L.

Front B speaker connections work.

So you may need to figure out the best speaker combination with the available connections. I'm just not sure about those 3 connection that ate not producing sound.

The Center and Front A left and right all work all along with Front B left and right.