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 
Subdevice #0: subdevice #0
pi@raspberrypi:~ $ aplay -L
Discard all samples (playback) or generate zero samples (capture)
Default Audio Device
Direct sample mixing device
Direct sample snooping device
Direct hardware device without any conversions
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 :
and here is my alsamixer :
If somebody can tell me what's going on. Is it a hardware problem ?