No HDMI motherboard signal, but VGA on DVI-I adapter works. Please help!

Dany1987

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Oct 10, 2015
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Greetings mighty gurus,

I bought a new PC and booted it up. Only the hardware was fully factory-prepared. After the first start I had to install Win 8.1, all the drivers, settings etc. The problem is I still can't connect my monitor through HDMI cable, I get the "no signal detected" error. However, VGA with DVI-I adapter, which is located on my GPU (this is important), works well.

HDMI port on the monitor and all the cables work fine, I checked that on my notebook, and it connected and displayed in a few seconds properly, so I guess it's not a HW problem.

The only and single HDMI port is located on my motherboard, while the monitor has two HDMI inputs. The graphic card (surprisingly?) has no HDMI ports, as I expected it to have. But the DVI-I port on GPU is working, when connected through a DVI-I adapter to VGA cable. Other ports on the motherboard are working too, like USB etc. When I tried the direct VGA connection, I found out the VGA on the motherboard does NOT work - no signal detected.

So I guess it has something to do with the BIOS configuration - I probably need to switch the default video output from GPU to motherboard. I read somewhere on the internet, that the GPU attached to motherboard is somehow taking control over the motherboard's video ports. So I entered the BIOS and "randomly" tried to switch a couple of settings, without luck. I hoped there will be some kind of clear "select video device input" option or whatever.. but that's where my knowledge ends.

Any tips how can I get the HDMI on motherboard to work? Or which BIOS option enables the motherboard HDMI port? Thank you very much!


Monitor:ASUS VX248
GPU: NVIDIA GeForce GTX 750 Ti
Motherboard: ASUS 8XM-A
Windows 8.1 fully updated
I have a motherboard driver CD, NVIDIA graphic card driver CD etc. I installed everything and I think the drivers have nothing to do with the problem.
 

Dany1987

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Oct 10, 2015
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4,510


Well I thought the NVIDIA GeForce GTX 750 Ti was considered a good middle class GPU nowadays :) I believe it supports the HDMI, I just thought it will somehow use the port from the motherboard, to which the GPU is connected (sorry if that's a nonsense, I am no expert)..

So there is no way how to enable the motherboard HDMI port from BIOS, when the GPU is connected?
 

Dany1987

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Oct 10, 2015
3
0
4,510
Damn, my humble apologies :( I I just took a careful look at the GPU ports and found out the GPU actually HAS an HDMI port ! :) But it's the miniHDMI one. The monitor uses the bigger version and I thought it does not have any, as it didn't fit lol :D

I am gonna buy the HDMI / mini HDMI adapter tomorrow. Sorry for the spam..