G920x Live demo Unit : prob with TWRP

Hi all,

I know there is a lot of thread about this model, but I still have a problem.
I have root with CF-Auto-Root-zeroflte-zerofltedv-smg920i but can't install TWRP or Clockwork recovery...still stock one is present...
I have noticed I have to push buttons Volume up + home + power before Samsung Logo appears to prevent from flashing back by installed stock rom...
But, when I try, the phone freezes on Samsun Logo (first one) and I have to reboot (I have wait more than 15 minutes)
When The phone reboots itself after root, stock recovery is still present
When I try to install TWRP (twrp-2.8.7.1-zeroflte.img.tar) with Odin, same issue
I tried lot of stock rom from sammobile, but all fail at the beginning of writing Nand.
So I can't install any rom on this "phone"
In the recovery, modele appears as LRX22G.G920IDVU1AOC6
In download mode I have

Quote:

Odin Mode PRODUCT NAME : SM-G920X Current binary : Custom System Status : Custom Secure download : enable Knox warrenty void : 1 (8x9500) AP SWREV : 1 Kernel AP SWREV : 1

If someone could help me.....
Thank a lot