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
*** LIST of Play...
card 0: sndrphifiberry [snd_rpi_hifiberry_dacl], device 0: HifiBerry DAC HiFI pcm5103a-hifi-0 
Subdevice #0: subdevice #0
/usr/bin/play WARN alsa: can't encode 0-bit Unknown or not applicable
Channels: 1 @ 32-bit
Then seems to play, but no sound.
BTW, should there be any lights on the amp+?
RP2 + Amp no sound even with Testimage