[HELP] Toshiba S50-B-12C : Bios corrupt ?

Hello,

I come back with another laptop... For the background, i just change the HDD by a SSD. All was good, Windows 10 with latest update working well.
I shutdown the laptop and today, when i try to power on, black screen...
I check RAM, try to connect an external screen, remove SSD and put back the original HDD, make a little reflow on RADEON GPU chipset : black screen.
The keyboard backlight is on, if i push a touch, the light come like if all is ok but nothing, no logo, no screen, no boot.
I make a dump of the bios file but i don't know how to check if something wrong happen.
Another difficult : Toshiba never publish a bios file for this model ! It's the first time i see that...
I have a Toshiba Satellite S50-B-12C

Can someone check the bios file please ?

https://file.io/JrEhOK44TsTG

Thank you very much