My htc one doesn't load

[nirqa]

Hi,
I have the htc one 807n with the original rom.
Today i recived a massage says there are an available update, and i updated it.
The download edn's, the device reboot itself and start installing when a red triangle appears on screen.
Since then my device is stuck on this situation

And doesn׳t load.
please help.

 

[benny3]

Were you rooted?

 

[nirqa]

Hi,
No I did not rooted my device.
I also can not see the device when I plug it in to the computer.
I try to enter the boot loader and initiate a reset from there but it always go back to the openning screen i attached here..