Hi, I have the same Mobo and Debug LEDs are very useful in such a case but if you are getting different LEDs at different times, it seems like the Motherboard could be at fault.
Best case scenario would be to take the whole system to the shop you bought it from, but in case that is not possible, I would go for replacing the mobo at first and if possible try to troubleshoot the rest of the components at say, a friend's pc.