Fairphone 5 doesn't turn on anymore (Black Screen) after charging it overnight

Hello everybody,

Yesterday, I tried to turn on my Fairphone 5 after charging it overnight, but unfortunately, it won’t power on — the screen remains completely black.
So far, I’ve tried the following steps without success:

  • Removed the battery for about 3 minutes and reinserted it
  • Switched to a different charging cable (including an official Fairphone one)
  • Pressed and held the power button for over 20 seconds

None of these attempts worked.
Does anyone have an idea what else I could try or what might be wrong?

Thanks in advance for your help!