No Video Input after upgrading CPU

  ragnaromyomyo 18:37 18 Mar 2015

Hi everyone. Here's a conundrum for you guys...

This is quite a story...

I bought the following MSI H61M-P25 Motherboard and i3 2120 CPU. I get a No Video Input message on the mobo and when I connect it to my graphics card (MSI N450GTS CYCLONE).

If tried several DVI Adapters with no luck. Bought a new LED Analog and Digital (DVI and VGA Ports) Monitor and only got it working on the DVI port on the mobo but not graphics card.

So I bought 2nd hand ASUS GTX480 to see what will happen and it worked. I finally got display on the graphics card with both LCD and LED Monitors.

Now comes the tricky bit!

I bought an upgrade CPU i5 3470 and installed it and when I switched on the PC the ASUS GTX480 has the same problem, no video input with both LCD and LED monitors. There's no option in the Bios to switch to graphics card (that I can see) and Bios is updated.

I'm really stuck as none of my 3D applications which I use are working. I'm getting no 3D capability error.

Don't know what to do next. All I can think it that the integrate graphics on the CPUs are prioritizing it's graphics and switching off the graphics card? There's no sign of the graphics card in the device manager so I'm guessing windows doesn't detect the graphics card.

So to sum up Graphics card was giving signal but after CPU upgrade I'm getting No Video Input. The graphics card still works as I tested it in my other PC again.

Any help will be appreciated!

CPU works, ram works, mobo works, hard drives work, graphics card works, power supply works as I've tested them separately in my other PC. The setup does post because if I plug the DVI cable into the motherboard's DVI port I see window login screen plus I can hear the windows boot up sound.

Thanks in advance!

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