lhg5nd was not working

hi
i have an lhg5 nd
that is not working
I tested with winbox, It doesn’t recognized
so I tested with netinstall and I tried hard reset using reset button but it does not react anyway
and always leds ( power, user, and 3 of signal led) are on
what are the possible solutions ??

https://ibb.co/DMFZBYR