Audiophonics I2S DAC's I-Sabre ES9023 (two types)

Hello, I’m new here.
I hope you can help me, I bought a Audiophonics DAC ES9023 I2S and connected these to the raspberry pi A.

ebay.de/itm/Audiophonics-I2S … Sw~OdVZXtm

I can connect the Pi to volumio, take hifiberry as driver, Star music but there is nötig sound.

Have some one an idea what i should do?

How can i Test by measurements on the dac Board if this is defect?

Know somebody that there is a Reverse polarity protection on the dac Board?