Problem on 1st build after power outage

[Tycoon4u]

My new build worked perfectly til our power went out one day. Now it won't start. The mobo led was blinking so after some research I replaced the PSU. Then the led stays on steady but still won't start. Next I replaced the mobo, still nothing. Then I put a new PCU in the new mobo and still nothing. I disconnected HD and cd rom, 1 stick of mem, and jumped the power switch term on the mobo. Still nothing. Any ideas anyone?
My system:
Intel Pentium E5200 Wolfdale 2.5GHz LGA 775 65W Dual-Core Processor Model BX80571E5200
ASUS P5KPL-CM LGA 775 Intel G31 Micro ATX Intel Motherboard - Retail
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ - Retail
LITE-ON 20X DVD±R DVD Burner Black SATA Model iHAS120-08 - Retail
Western Digital Caviar Blue WD3200AAJS 320GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
Microsoft Windows XP Home SP3 for System Builders - OEM
COOLER MASTER Elite RC-330-KKR1 Black SECC ATX Mid Tower Computer Case 350W Power Supply - Retail
SAPPHIRE 100255HDMI Radeon HD 4670 512MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
CORSAIR CMPSU-450VX 450W ATX12V V2.2 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Retail
Thanks,
Dale

[AshJustAsh]

Originally Posted by Tycoon4u My new build worked perfectly til our power went out one day. Now it won't start. The mobo led was blinking so after some research I replaced the PSU. Then the led stays on steady but still won't start. Next I replaced the mobo, still nothing. Then I put a new PCU in the new mobo and still nothing. I disconnected HD and cd rom, 1 stick of mem, and jumped the power switch term on the mobo. Still nothing. Any ideas anyone? My system: Intel Pentium E5200 Wolfdale 2.5GHz LGA 775 65W Dual-Core Processor Model BX80571E5200 ASUS P5KPL-CM LGA 775 Intel G31 Micro ATX Intel Motherboard - Retail G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ - Retail LITE-ON 20X DVD±R DVD Burner Black SATA Model iHAS120-08 - Retail Western Digital Caviar Blue WD3200AAJS 320GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM Microsoft Windows XP Home SP3 for System Builders - OEM COOLER MASTER Elite RC-330-KKR1 Black SECC ATX Mid Tower Computer Case 350W Power Supply - Retail SAPPHIRE 100255HDMI Radeon HD 4670 512MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail CORSAIR CMPSU-450VX 450W ATX12V V2.2 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Retail Thanks, Dale

Wow, that's interesting. I'm not the queen of everything techy, but if you've replaced both the psu and the mobo, the only thing I can think that would be the problem would be the CPU it's self; if you just transferred it from the old mobo to the new one.

Maybe the HDD? But even if the HDD was fried you should still be able to get something on boot.

[Tycoon4u]

I brought my other rig home from the office (exactly the same except no vid card) to swap mobo into to narrow it down. Low and behold after a close look at the connections, I had the pwr button and led switched around on it. Now it works fine. It was just the PSU and I now have spare mobo & PCU. wheeew.
Dale