R7800 Firmware corrupted

Hello all,

(sorry, i'm french and my english is a little poor)

I'm just arrived in this forum because i tried to flash my Netgear R7800 and now the firmware is corupted (the power led flash slowly)

The router answer to ping (192.168.1.1)

I tried to flash the firmware with the OEM factory firmware(R7800-V1.0.2.62.img) through tftp2.exe but it does not work.

Have you any solution to this issue.

Regards,

Baptiste