All of the parts I have are new. DFI Lanparty 4 Ultra D, AMD Athlon 64FX 55, Samsung SATA 400GB 8mb cache HDD, and OCZ 600watt Gamexstream PSU. When I switch it on, power comes on but monitor doesn't turn on. So I have no choice but to turn the system off then turn it back up again, and monitor turns on like it had no problem. Except this problem, this system is very stable. I appreciate any helpful inputs.