Monitor not displaying when computer is powered on.

[snakcaz]

Situation: Yesterday night my monitor and computer were working just fine. I turn my computer on this afternoon and the monitor does not recognize any sort of video source. The monitor is powered on, but is in sleep mode, and my computer is on and running. What could be wrong? Why isn't my monitor recognizing my computer?

*Note: I know the problem is not the monitor. I connected the monitor to my laptop, turns on and works just fine. So I think the problem could be either the GPU or motherboard?

Monitor: Dell U2311H
Graphics:: Diamond Radeon R9 280X
Motherboard: Gigabyte Z68P-DS3 (rev. v1.0)

Some solutions I've tried:
-Changing cable connection from [DVI-D-DVI-D] to [DVI-D-HDMI].
-Connecting monitor to motherboard. Monitor still doesn't recognize it
-Resetted BIOS/CMOS to set motherboard to default settings. Removed battery and re-insterted.

Any suggestions or solutions? Thanks!

 

[popatim]

When you boot up the pc, did you hear the windows startup theme/noise from the speakers?

 

[snakcaz]

I don't have a speaker for the motherboard.

 

[popatim]

No the windows startup these would play thru your system speakers or headphone. Hook something up to the soundcard if you dont already and have a listen. If you hear it you know windows booted. If you dont then windows did not boot and it the problem is bigger than just it not displaying to the monitor.
Windows 7 startup sound video

 

[oohoohpickme]

No the windows startup these would play thru your system speakers or headphone. Hook something up to the soundcard if you dont already and have a listen. If you hear it you know windows booted. If you dont then windows did not boot and it the problem is bigger than just it not displaying to the monitor.
Windows 7 startup sound video

Hey, I'm having the same problem as OP and I can indeed hear the Windows7 startup sound. I know for sure that my monitor is fine, since I have hooked it up to another laptop and it was working. All I've tried so far is to power it down, plug the power cord out, and pressed the power up button to release whatever power was there. (several times, I do'nt know if this is harmful, though.) I'm thinking it's something hardware related, specifically with GPU connection to the motherboard, however NOTHING has been messed with from last night. Any help?

 

[snakcaz]

UPDATE: Motherboard without graphics card works fine.

I took out my gpu and nothing seems damaged cosmetically or visibly.

Could the gpu not being properly cooled stop it from working or turning on?

 

[ffg7]

if motherboard posts using onboard video then the videocard has crapped out. also possibly that the psu is dying thereby no providing enough power if directly connected to videocard so try another psu.

 

[snakcaz]

I have already found out that my 280x card has fried. As of writing this, I already installed an ASUS R9290X =)

 

[popatim]

Grats!