I have RB751G-2HnD and i have done some things on system like configure sntp and add new rule to firewall. Later i got massage that wifi its not working, i look and i see it was enabled but no stream was going on it. I thought, i have done somewhere somethng so i decide to restore backup. After i click on restore and wait few minutes, the router was not functionaly. so i decide to unplug it and turn it on again, but no change. So i tried the reset button, but reset button does not work. Later i found the second reset option by short circuit on board (there was hole from bottom with wich it can be done). But again, no reset was done. I have tried do it many ways but nothing. Anyone knows what can happend? No IP is configured, and i no connection with winbox can´t be done. The router just on booting turn ACT LED on and then off. Connected ethernet cables are active, sonetimes flash