Hi all, I am a new hardware enthusiast and I just assembled my first PC about 3 months back. Now, all of a sudden, one fine day, my PC just powered off on it's own. After some initial troubleshooting, I noticed that when I power it on, it begins booting, but the keyboard doesn't seem to work (Num Lock stays on) and after sometime (about a min or so), it seems to power off - all fans stop, display also goes off and only the front power LED remains on. First, I thought that there could be something wrong with the power supply (since the fans are directly connected to the power supply), so I replaced the power supply with a new one but the problem still persists. Any idea on what could be wrong? Help will be highly appreciated! Thanks, Neelay.