Stuck after grub

Hello,

I have a very strange situation, one of my server is now stuck in grub.
I.e : I can not go after grub.
At the moment, I have try :

- Older kernel / Recovery kernel => Load initial ramdisk message, then nothing happen.
- No splash, quiet option => nothing write down on screen
- adding loglevel=7 same result : nothing

What is really strange is that I have also the exact same situation using LiveUSB ( I have try several distro and several version)
It get to grub screen and then what ever I select endup on a black screen without any log message on screen...

Any idea of what I can try now ?

Regards,
Adrien