IOConsoleusers when booting Mac

Hi all,

I have an old Macbook Pro, probably from 2010, running El Capitan.

Last time I used it, I closed it without switching it off. Next time I open it, the whole battery was drained.

From there on, impossible to restart. The loading bar ends around three quarters and the screen switches to being whole white.

Safe mode doesn't work either.

When loading in Verbose mode, the last line starts with

IOConsoleusers ...

And gets stuck there, or the screen switches to white again.

I tried putting Sierra on a USB stick and starting from the USB stick, but I get stuck at the same point.

Thank you very much for your help !