Hi. Few days ago our power supply used on RB600 died. Since we thought that's was the only problem, we have bought a new one and replaced but it seams that board is not working.

When I plug it into a power, it starts booting (I've connected it to serial cable to see what's going on), it gets to the point "Starting services" and just freezes.

Also, problem is that I can't change anything VIA serial boot console. Board is stable for a second or two, gives me option for example to change baud rate and when I press anything, it just freezes.

Often I can hear it beep for 2 times, signalizing it's working and often I can see it on winbox too but in really rare cases.

Often, board won't even beep for 2 times and all the lamps are active (besides the green one above blue one).

What can I do about this ? I've tried to reset configuration on a jumper, won't reset it too.

Is there anything I can do to see if I can fix this board. Or maybe it's destroyed by the power supply when it went off.

Please help
Alex

how do you power it?via jack or poe?try different ways.try to find "bad" elements visually, it may be broken capacitator or something else.