New build. Led on Motherboard lights. Led's flash but CPU won't start.

I recently put together my first pc build and am having trouble getting it working. When I flip the power switch on the PSU, the motherboard LED turns on. When I press the power button on the case, the rest of the motherboard LEDs flash but nothing else happens. Please help :-(

Here is my build:
Motherboard : Asus P7P55D Deluxe
Processor: Intel Core i5-760 (2.8 GHz)
RAM : Corsair CMX8GX3M2A1333C9 XMS 8GB DDR3 RAM (2x4GB)
PSU : Cooler Master GX 650W
Video Card : Diamond ATI Radeon HD5850
Case : Cooler Master HAF 922M ATX Black Mid-T Case
HDD : WD Caviar Black 1TB SATA HD 7200/64MB/SATA-6G
Network : Intel PRO 1000 PCIE Desktop Gigabit

Please please help. I'll be happy to take any suggestions.
2 answers Last reply
More about build motherboard lights flash start
  1. which light turn on? Do you have a system speaker installed that beeps when you start up? Did you make sure to plug in the 4+4 cpu power from the psu to mobo?
  2. fixed the problem. some of the wiring wasn't secure... newbie mistakes :D

    thank you for your help
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