Computer won't power on

[CaptainShake]

Hey, so I built my second computer and I've plugged everything in correctly, the power supply, cpu, harddrive is connected and everything, graphics card is hooked up, etc. Now when I turn on the power supply the LED for the power button glows, but when I push the power button nothing happens. None of the fans start, no noise, nothing. Is there any other info I should give for assistance? Thanks for any and all help.

CPU: AMD Phenom II X4 955 Black Edition Deneb 3.2GHz Socket AM3 125W Quad-Core Processor
GPU: SAPPHIRE 100283-3L Radeon HD 5770 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
Power Supply: APEVIA ATX-TL450W 450 Watts ATX12V Power Supply - OEM
Motherboard: MSI 880GM-E41 AM3 AMD 880G HDMI Micro ATX AMD Motherboard

Sorry my hard drive is one I used on my old comp and I don't remember what make it is.

 

[MindoverMaster]

Did you attach the 4/8 pin? near your CPU.

 

[Slaymate]

Please list all your components, include the Manufacturer, Model Number, etc...

 

[CaptainShake]

Yeah the pins are plugged in and I added the parts in my first post.

 

[Slaymate]

I'll bet money it's the $20 Apevia power supply. Buy a good power supply from a reputable manufacturer.

 

[CaptainShake]

Hm, I guess it doesn't pay to be cheap. Thanks for the advice, I'll let you know what happens when I get a better power supply.