Well, its been some days that the PSU is making some noise, could be dust or a foreign object. I blew it with a hairdrier(cause i didnt had an air compreser at hand) and got fixed. The next day i started the computer the same noise started again blew it once more and stoped. Third day, again blew it, nothing happened, blew it again, still no thing vaccumed it(with the ground pluged in and the psu off for the static build), blew it and vaccumed it together, still nothing, I blew it again from the back and it stoped. There is a great change that the foreign object thats causing it is still there and will return when the psu settles down. I dont think that the air compreser will be able to force it out. What should i do?