My computer won't turn on right away if I press the power button sometimes. Sometimes I have to hold down the button for a little or press it 3-5 times, other times it will turn on the first try. Why does this happen? I don't think its a problem with my PSU, but I could be wrong. Once I get the computer to turn on, it never shuts down or has any other issues. Could it just be a problem with my case's power button, or is it some serious issue like a failing HDD or PSU? I've also had a strange noise coming from my computer for about a month and I can't figure out what causes it. I never had the noise until I ran Prime95 one day and it just appeared after about 30min of testing. It's hard to describe a noise, but to me it sounds like a constant high-pitched buzzing sound. I don't think the noise is related to any problems, but it just annoys me. How can I confirm what causes the noise? What device would make that noise? I 've already unplugged my three case fans and noticed no difference. Could a HDD make that noise? Thanks for any help.