Problem with hifiberry and volumio

I am having an issue with hifiberry and volumio. I installed hifiberry and volumio and the software is installed fine according to the test script. Also the green led lights up but I do not have asignal on the optical or coaxial output (no light can be seen). I tried 3 psu but it keeps on failing. Is there something I can check or do to get it working? Thanks


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