Routerboard 600a problem [SOLVED]

Hello,

I have Mikrotik routerboard 600a and it seems to have a serious problem.
It boots up, does beep which means it is starting up , then it does beep beep which means it has booted up and 1-5 sec after booting up it reboots. Like an endless cycle.

Any ideas what to do?

connect a serial cable, and watch in a serial console program what it does before it reboots. maybe there is a software crash. a reinstall would help, but you need to see it on the console to confirm

Thanks, i try the serial cable thing and see what happens.

Well, if it is software crash, how would reinstall be possible if it reboots very very quickly?

EDIT:

First i tried software reset from board, it did not help. Then i did firmware reset from board (short sircuit stuff) and now this board works!!!

Anyways, thank you for help!

reinstall starts before software boots. http://wiki.mikrotik.com/wiki/Manual:Netinstall