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RP2 + Amp no sound even with Testimage

Hello,

received my new RP2 and the hifiberry amp+ yesterday, but even with the testimage there is no sound.
PS is a Meanwell 12v 5A.

one message is:

snd-rpi-hifiberry-dacplus snd-rpi-hifiberry-dacplus.0: snd_soc_register_card() failed: -517

sound cards:
*** LIST of Play...
card 0: sndrphifiberry [snd_rpi_hifiberry_dacl], device 0: HifiBerry DAC HiFI pcm5103a-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
.
.
.
/usr/bin/play WARN alsa: can't encode 0-bit Unknown or not applicable

ENCODING: n/a
Channels: 1 @ 32-bit
Samplerate:
.
.

Then seems to play, but no sound.

BTW, should there be any lights on the amp+?

Thanks, Robert

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