Well I have some serious problems about hardware (RouterBOARD) and not about RouterOS…where I can find forum for that? 
Thank you!!!
But this links me right here… 
well it supposed to be hardware forum, but you can post your problem here. We will try to help you.
OK
We have a big wireless network and it is almost completely build from Mikrotik’s devices (300 of RouterBOARDs of all kind)…but in the last 10 days three RB 532A crushed…to be precise the POE port always goes up and down…these routers were working for about 2 years…so what is the problem? Is this theirs life-time?
try another power supply and ethernet cable going from poe to board. If it doesn’t help contact support [at] mikrotik.com
Thanks dude…