RB 4011 freeze

when i trying to hard reset my rb 4011, my router suddenly hanged (freezed). its showing power is on but not working at all. kindly suggest me how can i resolve the problem

Netinstall.

netinstall is probably the only way…but did you confirm that you cannot mac telnet to the router via winbox? When you hard reset the router…it loses its IP address and the default may be set to 0.0.0.0 so you wont be able to get in unless you do a mac telnet 1st to assign the IP to an interface or bridge