I am having starting prob. with pc fan. Some tak..tak..tak..tak...voice comes from pc fan (most probab) and the busy/prcessing light outside PC blinks with same frequency of that sound. Untill the sound comes the PC doesn't starts. If I ON the speakers, Same frequency sound can be heared from it,(* eg. when we sometimes ON the tubelight ,some sound comes from the speaker with same freq. of blinking of tubelight.) This happens for about a minute and then the sounds and blinking stops and the PC starts. What should I do?