[Q] Big problem with my wifi

Hello everybody,
I have a Samsung Galaxy S4 i9505 4G (with a Qualcomm SnapDragon S600) and I have a big problem with my wifi : It doesn't work, activation is impossible.
Last Avril, I flashed my device thanks to Odin with the firmware XXUFNC4 and I rooted as well.
Since that day, I didn't alter my device but wifi's problem appeared at the end of July.
So I tried many solutions :

- Many ROM : Samy S5 Deluxe, Google Edition, official's firmware XXUFNG8...
- Various Bootloader & Modem with new ROM.
- Various Kernel (AEL, GoogyMax...)

But the wifi doesn't want to activate...

Now, I have the official's firmware XXUFNC4 (flashed twice with ODIN + flash of PIT alone + last flash of XXUFNC4 with ODIN) and the problem is still here...

I have :

AP : I9505XXUFNC4
CP : I9505XXUFNC4
CSC : I9505XXFNC3

I hope this isn't a hardware's probleme because of Know Warranty 0x1...

Thank you in advance for your answers.

PS : Sorry for my english, it's not my native tongue.

I tried five times to flash this file I9505XXUFNC4_WIFI_FIX.tar in CP with ODIN but wifi doesn't work...
But after the first and second flash of fix Wifi, I succeeded to connect a Wifi a few secondes.