netgear m2 startup issue

hello, I have encountered a problem with my mobile hotspot which is Netgear m2, the problem is sudden the router lagged and then i realized it is stuck at the boot log, tried to restart it by removing battery and still stuck, i tried to reset the device same thing no good doing so , i tried to connect using Ethernet but i can not access admin if the device not booting , the question is any tips to get the router (hotspot) fixed i showed it to carrier provider they said because it passed one year therefore out of warranty.

additonal the router already have latest update 

regards and wishes