Hi all, I'm back and still rocking the Dell XPS 600. In the past you guys have helped me in getting a new graphics card which helped me tremendously (http://www.techpowerup.com/forums/showthread.php?t=107525). But unfortunately it looks like my system may have died. Ok for about a year now, after I've put on my PC, I would always have to restart it straight away. If not it would hard restart after about 10 minutes (I was told the pc power supply was the cause). But now when I put the pc on. This happens: The fan goes into overdrive mode making so much noise and my pc won't boot up into windows (I have a suspicion it is the power supply in my pc) The power on button stays "amber" whereas it usually turns "green" when starting up. Do you think it's the power supply? And is it easily replaceable. My PC Stats are: Intel(R) Pentium(R) D CPU 3.00GHz XPS 600, PD, 830 (3.00GHZ) 2X1MB, EM64T MEMORY DUAL CHANNEL 2048MB (4X512) 667MH 250GB SATA (7200RPM) HARD DRIVE WITH 8MB NVIDIA GEFORCE GTS 250 Thanks.