No Image from ASUS An8

[IdLogin]

I have an Asus An8 sli delux Motherboard. Both graphics cards working but no image on my monitor.
The monitor just stay's in standby mode while the computer boots up.

Is there something I'm missing that could be causing this to happen.

For example could the computer boot up if the cpu was not working, but stop an image being sent to the monitor.

 

[Harvey]

Have you tried another monitor?

 

[IdLogin]

It works fine with my other computer

 

[GuitarDaddy]

Do you have speakers plugged in and turned on? Getting any post message?

A female voice will anounce "failed CPU test" or "failed VGA test", etc...

 

[grooge]

did you plug all power connector where they should be plugged??

 

[Muggy]

Have u tried connecting the monitor to both graphic cards, one after the other ?

 

[IdLogin]

I tried what you suggested and I do get the post meesage "system fail VGA".

What does this mean I have to do?