Default TFT300T BRick follow clockword recovery

HEllo,

Yestarday i puted on my TF300T cynagogen rom. To did it before i unlock the bootloader and put a recovery in fastboot mode (all seems succed because i well the devise is unlocked at startup) BUT i do a wipe cashe, and reboot my TF300T too earlier i guess... now my TF300T cannot reboot and it stucks to the screen logo with msg at top right (devise is unlocked)...

I'm very sad.. and try to correct this issue :
- i cannot use adb and fastboot (devise no recognize because F300T did not start and stuck at logo screen)
- i install android drivers
- i can use APX mode

In APX mode i try to ip contains in this zip file download from asus : TF300T-WW_epad-10_6_1_27_5-UpdateLauncher.zip (put in SDcard)
but i have no update message so i search another solution...

I see that there is a tools "NVFlash" but i m not really technicall and i don't really understand ... because in this step :

https://www.androidroot.mobi/pages/g...ash-jellybean/

it write to begin "connect in fastbooot mode", ... me ? i cannot connect to fastbootmode, juste APX...

So if somebody can help me to unlock my tablette and resused it ...

Thanks a lot...

Rgds