Hey @hugo.piaget, welcome to backstage (and sorry that you have issues with your Play+). 
Here’s some more things you could try, before contacting support:
- try powering the device from a different place (powerbank or from the psu block)
- try a different sd card (or format the current one)
If the issue still persists, i would get in contact with support (either from the place you bought the device or Polyend directly).
Hope you can get this solved quickly 