I got a Mikrotik RB450 using at my office. The problem is sometime the router like hanged and caused some of the users still can browse and the other can't browse. The I unplug the routerboard, it beeps a long beep like 1-2 second before power down and the same beep sound after the routerboard power up. I think the routerboard must have a problem, but I cannot found anything in the internet about that.
Anyone can help me with that problem?