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HiFiBerry AMP2 suddenly stopped working

Hello,

I own a Hifiberry Amp2 that I've been using for Google assistant and for bluetooth audio streaming since 2 months.
Everything was working fine until this morning. I asked a question to the assistant and got no answer. I tried to reboot the raspberry 3b+, ssh was not working anymore. So I unplugged the power supply (12V) and put it in again, making me able to log into ssh account.

Unfortunatly the Amp2 doesn't output sound anymore. I tried to play a mp3 file, tried to run the google assistant, to stream a song from my phone with no luck. No audio is coming out now but everything was still working  yesterday. I didn't change anything in my raspberry between the "working" and "not working" moments.
There is no sound coming out to the speakers and neither out of the audio jack.

Here are my settings :

pi@raspberrypi:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

 

pi@raspberrypi:~ $ aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
dsnooper
dmixer
default
sysdefault:CARD=sndrpihifiberry
snd_rpi_hifiberry_dacplus,
Default Audio Device
dmix:CARD=sndrpihifiberry,DEV=0
snd_rpi_hifiberry_dacplus,
Direct sample mixing device
dsnoop:CARD=sndrpihifiberry,DEV=0
snd_rpi_hifiberry_dacplus,
Direct sample snooping device
hw:CARD=sndrpihifiberry,DEV=0
snd_rpi_hifiberry_dacplus,
Direct hardware device without any conversions
plughw:CARD=sndrpihifiberry,DEV=0
snd_rpi_hifiberry_dacplus,
Hardware device with all software conversions

 

My .asoundrc seems a little bit weird but I got it from the google assist github  https://github.com/shivasiddharth/GassistPi and even if I don't really understand all the settings it was working great unti now :

pcm.dsnooper {
type dsnoop
ipc_key 816357492
ipc_key_add_uid 0
ipc_perm 0666
slave {
pcm "hw:1,0"
channels 1
}
}
pcm.dmixer {
type dmix
ipc_key 1024
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 8192
rate 44100
}

}
pcm.!default {
type asym
playback.pcm {
type plug
slave.pcm "dmixer"
}
capture.pcm {
type plug
slave.pcm "dsnooper"
}
}

 

and here is my alsamixer :

https://i.ibb.co/PhFr6pz/Capture-du-2019-04-29-20-46-29.png

If somebody can tell me what's going on. Is it a hardware problem ?

Thank you

 

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