HTC desire 826 dead

Hi guys

I have Htc desire 826 16gb dual.
I made a factory reset inside of setting.
But when the "android is upgrading" completed and I completed the first boot of my phone...I don't have anything in my screen except the notification bar and when I restart my phone...It freezes in the logo of htc.
I wiped factory setting and cache but still nothing.
I searched the net but I couldn't find anything to reinstall the stock rom.

I will looking forward if anyone can help me.

thanks