New Computer will not post on Monitor

[Looselywound]

I have built a computer that will not post. Tried with 2 different monitors. I did change the video card out and still did not work.  What I have is: MB Asus M5 A97 R2.0.. Ram is 1 stick 8gb Viper Xtreme... CPU AMD FX 8150 8 Core Black Edition... Video PNY Geforce GTX 650ti Boost... PWRS Thermaltake TR2 700w...  1tb HDD.. Blueray DVD and is in a Corsair Case. I have built several pc's and never run into this problem before. The MB has a green light onboard which is green when it is turned on and hear the beep but never see video on screen.  That is why I tried an old 520 card I had which worked on another pc. This MB does not have on board video.  Any help will be greatly appreciated.

[Calum]

Have you tried the video card in another slot?
Do you have a known good stick of RAM or a PSU you could try?
Finally, if it's still not working try the system outside of the case to make sure it's not shorting on anything.

[Geek-9pm]

Does keyboard light up?
Do drives spin?
No beeps?
Fans?

[Looselywound]

Calum: I have tried the video in another slot. I have another pc that I will remove a stick of RAM and try.   I tried a Tri-Core Chip just for grins.  I'm wondering about the MB shorting out and I will try that when I get time, have not thought about shorting MB.
Geek-9pm: all fans work, keyboard lights, hdd spins and dvd lights.
Thanks for the input guys!

[Geek-9pm]

Study the pastern of normal lights on a keyboard when a PC does power up. The keyboard  light flash not only tests the keyboard but also shows the BIOS  is doping the POST. Both CPU mad memory must be working for this to happen.

[Looselywound]

All three lights flash one time on keyboard.  I removed the MB tested still did not work. Found a speaker from old case since one did not come with MB. Thought I had heard the chip chirp at startup but no beeps, also tried a different RAM stick. Cleared CMOS.  Tested PSU with gym clip fan runs constance with no ramp up or down.  Stumped now for sure.

[Geek-9pm]

Normal keyboard flash is:
The three lights  on for one second at power on. This is an electrical response.
Off for several seconds.
Numlock comes on. BIOS tuns it on with software.
Most BIOS default to Numlock on. If it stays off, the BIOS fell into a cyberspace black hole. The CPU stopped. Or never started.

[Calum]

have you tried the system with a known good PSU?  If so, it's the board at fault.

[Looselywound]

I'm thinking the board is at fault.  The 3 lights on the keyboard not lighting now when turned on.  Guess I need to contact MFG.

[Looselywound]

Update on POST. I have no problem to say this was my ignorance    and I have not built a computer in a number of years so after going back through everything I discovered that this MB requires a 8 pin ATX connector from PSU to plugin on MB, I then got 3 short beeps. I moved the RAM to a different slot 2nd from left and then I got POST, windows 7 loaded and now I'm good. Thanks for all the help I hope this may help someone down the road that may have the same issues. 

[Calum]

Glad you got it sorted in the end, it's nice to hear it was a simple solution and not something involving sending parts back and all the hassle that entails