No display when GPU is plugged in

[Lukep123]

Hey guys,

I encountered a strange problem today. My system that has been flawlessly working for 3-4 yeas wouldn't show any display this morning.
As a result, I started normal troubleshooting. I assumed it would be the GPU but tested it last and it was indeed the problem.

I then unplugged the GPU completely, connected the HDMI cable to the motherboard and the system boots and displays as normal.

I tried a different monitor, cables etc and still, everytime the GPU is plugged in the system will not show any display.
Even if he HDMI cable is connected to the motherboard, but the GPU is conencted to the PSU, the system will still show no display. Atter troubelshooting it became clear that if the GPU is recieving power, the system will simply not show any display.
As a note, if this means anything - the GPU can be plugged into the motherboard without being connected to the PSU and display does work when the HDMI cable is connected to the motherboard - not sure if this is helpful information for any reason.

Does anybody have any idea why this is? Some sort of Bios settings (Even though it worked fine last night and flawlessly for years)? Is my GPU fried?

System details:
Sapphire Radeon R9 280X Vapor-X OC 3072MB
Intel Core i5 4690k
Super Flower Leadex Platinum 750W Fully Modular "80 Plus Platinum" Power Supply - Black
Asus Z97-K Motherboard

 

[Jumballi]

Well to know whether or not the gpu is fried or if it’s a bios setting, you need to test 2 things;

1. The pcie slot the gpu was in

2. Another gpu in your system

[mbntr]

The reason when the GPU is plugged in the system the bios automatically uses it as the main display adapter and switches off the iGPU

[Lukep123]

2 minutes ago, mbntr said:

The reason when the GPU is plugged in the system the biosa automatically uses it as the main display adapter and switches off the iGPU

I see, thank you for letting me know.
 

3 minutes ago, Jumballi said:

Well to know whether or not the gpu is fried or if it’s a bios setting, you need to test 2 things;

1. The pcie slot the gpu was in

2. Another gpu in your system

I probably won't be able to access another GPU, not even to borrow - mainly why I thought it'd be ideal to ask here instead. Is there anything else I can do? The GPU is due an upgrade but I don't have a ton of money floating around if this issue can be resolved.

[Aragorn-]

Not really something that can be diagnosed remotely. Either get another card to test in your PC, or take your card and test it on another PC.