hardware – Ipad Pro 12.9″ black screen of death

Last Friday, after an usual work day with my iPad in side-car mode, I disconnected it from my macbook pro and let it sleep.

Today, when I wanted to use it again, the screen remained black. I tried the force-restart (volume up button then volume down button then power button during 5-10 sec, even 30…) with no success.

I also tried to charge it but still pitch-black.

Any other idea before Apple support…