Hello guys. I have problem with a computer I am building for my brother. I have collected all the pieces and I actually think the process went smoothly. But when I try to start the computer, the front blue power LED flashes for a second and then turns off. I took of the side panel of the chassis and saw that the CPU FAN and another FAN connected to the PSU started but then stopped after a second - just like the front power LED. A green power LED on the motherboard lights permanently when power is connected. The system has following specifications: Asus P5K, Intel P35, LGA775 Samsung SP T166 500GB, SATAII, 16MB CoolerMaster CM Elite 333, No PSU, Black Corsair TWIN2X2048-6400C4, 2x1024MB Corsair CMPSU-450VXEU, 450 Watt PSU Samsung SH-S203D, DVD±RW, Black, Bulk Inno3D GeForce 8600GT, 512MB, PCI-E Intel Core 2 Duo E8200, BOX So far, I have been troubleshooting and I've checked following things: I've double checked that the RAM was properly put into the sockets. I have put one unit in DIMM_A1 and the other unit in DIMM_B1. I have tried to start the computer with just one unit in DIMM_A1 but it didn't work. I have tried to reconnect all the cables (SATA and power wires). But it didn't help. I don't know what else to do. I really do not hope that I have caused damage to any of the parts. I don't think I did actually. I hope you can help find out why my computer isn't starting. Thank you!