black screen on monitor when gpu is connected

[kabi007aj]

Today I bought a gpu (r7 260x 2 gb). It's totally functioning. But when I brought it home & connected to my gigabyte h61 mobo through a vga to HDMI converter, the screen remains black as if switched off. but when connected to the regular vga port, the screen is ok.
(My gpu is 100% ok)
Expert help needed.

 

[xvid678]

How can you be certain that the GPU is OK?

Can you test with another GPU? If not, can you test with a different adapter?

 

[kabi007aj]

I tested it well from where I bought it.

 

[xvid678]

From what you tell me, I can only point in 3 directions: 1- try a different adapter. 2- test in another mobo, as your PCI slot can be damaged. 3-try a different GPU.

What PSU do you have?

 

[kabi007aj]

Tharmaltek 450 watt with one 6 pin connector

 

[kabi007aj]

2 months back, I used to run r7 250 ddr5 on the same psu & mobo.

 

[xvid678]

Well, I used to run a GPU in the old mobo I had, until I stopped, because it got damaged