As the title suggest I have a Cooler Master Storm Enforcer case with a front 200mm megaflow fan. Whenever the PC has been off for more than a couple hours, when I turn it on the fan clicks for about 2 or 3 minutes, and abruptly stops clicking and works as silently as it should. Are the bearings going bad? Should I go through the trouble of oiling them or look into a replacement? Any thoughts would be appreciated, Thanks.