My PC boots but I've no display..

[pgwcdlsb]

Hello,
Last month I've built my first PC, everything went ok and the PC was working fine.
Then, friday, I turned my PC in sleeping mode and then after one or two hours I tried to wake it up. It didn't worked so I turned it off. When I turned it on again, I had no display so I opened the computer to see what the debug leds on my mother board (an asus Maximus IV extreme Z) where showing. First they showed AE (Legacy boot event). After clearing the Cmos, disconnecting and reconnecting the GPU and the Ram, the computer seems to boot fine, the fans are on, the debugging leds show A0 (IDE initialization is started) and I can turn off the computer by pressing : Win + the right arrow + Enter, but I still without any display.
I've tried a lot of things like clearing the cmos again, using another screen, an other cable, another GPU, another power supply, booting on only one ram stick, moving the GPU to another PCI-e slot, disconnecting the satas, booting on the windows disk, nothing worked and a led on my mother board is red, the VGA led.
I don't understand what's wrong ...
Those are my specs :
-Asus Maximus IV Extreme Z
-Intel i5 3570k
-Asus GForce GTX 660
-2*Corsair vengeance 4gb
-Power Supply : 750w 80plus

Do you guys know what can be wrong with all that ?

PS: Sorry if I make English mistakes, it's not my native language

 

[Eyeye890]

Have you tried with no graphics card and using the internal graphics of the CPU? you might need to clear CMOS to get it to reset the BIOS setting that chooses the graphics card or internal graphics.

 

[ur6beersaway]

You might flashing the mobo bois again, but tricky at best with no display. Your 660 has all the plugs in the side? RMA/Return the motherboard there is very little left to do. Take out the CMOS battery for an hour. I know you already reset.

 

[sourodip]

is the LED of ur mobo giving red display while booting? have u plugged in the 3-pin power plug correctly? download the latest bios and flash it with a USB flash drive.

 

[pgwcdlsb]

Well I can't really use the graphics of my mobo cause I think it has no internal graphics... 🙁 So I'm going to try to flash with the newest bios .
Yes the VGA led is giving a red display during the boot and after that but I've search on the Web and I can't figure why.
Thank you for answering guys that's cool

 

[ur6beersaway]

Well I can't really use the graphics of my mobo cause I think it has no internal graphics... 🙁 So I'm going to try to flash with the newest bios .
Yes the VGA led is giving a red display during the boot and after that but I've search on the Web and I can't figure why.
Thank you for answering guys that's cool

Your right, weather your CPU has internal graphics or not, your motherboard cannot output it. Card only.

 

[pgwcdlsb]

So I just switch to the second bios of my mobo (cause it has 2) and I flashed it to the newest update then I powered the PC and I finally have display 😀 Then, the computer started, showed the first ROG screen and then turned back off after a few seconds then the computer restarted and did the same thing 4 or 5 times and then stopped. After that I cleared the cmos again, unplugged the computer, waited a few minutes and then plugged it back. I started the computer again and I accessed to the bios, I looked for some particular problems, every thing was looking fine. I closed the bios, and the PC finally started to windows like nothing had never happened.
I'm so happy right now, thank you for the support and help guys 😀 😀 !

 

[ur6beersaway]

Great, as it is a good board.. on & off is usually the motherboard shorting to the case in the back somewhere, but not always..good luck