I recently built my PC a couple months ago and I have one reoccurring problem. My case fans (rosewill cullinan) won't turn on probably 1 out of every 10 times that I turn on my computer. The fans have LEDs when they are on their high setting, so I have it always on high, (at least for start up) that way I notice right away whether or not my fans are working or not. The LEDs will not turn on when this problem occurs. The solution I have found has been to shut down my computer, wait a few minutes, then turn it on again, however this may take a few tries. I regularly shut down my computer Monday-Thursday and leave it on sleep mode during the weekend. Does anyone have any idea what may be causing this problem?