New PC Build - Z77 No Power, No Post

I just built a new PC. I was reading an thread on here from April, and used a similar parts list mentioned in the thread. Here is the article:

I changed a few parts, nothing in the core of it all. I kept almost all of the parts the same. The only thing that is different is I went with a different video card, and a different optical drive.

Here is my Parts list:
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($189.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ Outlet PC)
Thermal Compound: Arctic Silver 5 High-Density Polysynthetic Silver 3.5g Thermal Paste ($6.20 @ Outlet PC)
Motherboard: ASRock Z77 Extreme6 ATX LGA1155 Motherboard ($139.99 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($72.99 @ Newegg)
Storage: Samsung 840 Series 120GB 2.5" Solid State Disk ($90.99 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ Outlet PC)
Video Card: PowerColor Radeon HD 7850 2GB Video Card ($144.99 @ Newegg)
Power Supply: SeaSonic G 550W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($79.99 @ Amazon)
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer ($55.99 @ Newegg)
Total: $871.09
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-08-16 12:36 EDT-0400)

My case is not listed, because I used an old case from my old machine. I just gutted everything out of my old machine, cleaned it up and installed everything new.

My case is a Thermaltake Xaser III.

When I connected everything, I was positive I did everything right. However, when I attempted to power it up, nothing comes on. No power, no lights, no fans, nothing.

I don't know where to begin to troubleshoot this.

Strip everything out, and start over?

A case is a case, right? The case should have nothing to do with the power to the MOBO and its components. So should I unplug everything, and make sure I have solid connections?

Suggestions on where to start trying to look to get this thing powered up?

I appreciate the help/assistance.
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  1. Best answer
    Do you get any indication that the PSU is working? (any motherboard lights on, fans turning, etc) If nothing, is the PSU power switch on, is the wall socket hot? If you do get anything you can check your power connectors (24 pin and 8 pin ATX12V) first. Are you sure that the case power switch is wired to the correct 2 motherboard pins?
  2. Thanks! You gave me a good idea where to look. Yes, to answer your question, I had double-checked all the Front Panel switch connections, to make sure they were connected correctly.

    I double checked the ATX12V and the 24 pin and those had solid connections.

    So I double checked the surge protector, juice is running fine from the outlet I was plugged into.

    I powered on the Power Supply, and began unplugging the case USB connections. Apparently one of them was either bad, or was not correctly connected. As soon as I unplugged one of them, the fans started going immediately. I unplugged both Case USB connections, and restarted the PC, and now I get the Dr. Debug POST test on the Motherboard.

    Looks like I can get going now.

    Thanks for the tips on where to start looking!
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