Question What would cause no HDMI Signal?

[TipsyMcStagger]

I wasn't really sure where to post this so I apologize if this is the wrong place;

I have a simple build with an Asus Prime B450M-A motherboard. I'm using the on-board graphics. I have a ViewSonic VX3276-MHD 32 Inch monitor, which has two HDMI inputs.

I had the video connected via HDMI from the MB to HDMI input 1. It worked fine like this for several months. Then, one day, it randomly said "no signal." I moved the HDMI cable to HDMI port 2 on the monitor and all functions properly.

I assumed maybe HDMI port 1 on the monitor got fried from a thunderstorm or something. But when I connect another input to HDMI port 1 (my security system NVR) , the monitor works properly.

I tried using a different HDMI cable from the MB to HDMI port 1, but no dice. It will only sense a signal when connected to HDMI port 2.

Any idea what could cause such a thing?

Thanks.

 

[COLGeek]

When switching HDMI ports, are both the PC and display powered down?

 

[TipsyMcStagger]

When switching HDMI ports, are both the PC and display powered down?

I have tried that. No difference. HDMI port 1 on the monitor shows "no signal" and HDMI port 2 works just fine.

Again, the strange thing is that HDMI port 1 used to work perfectly when connected to this computer. Then one day, it simply stopped working ("no signal"). But I have verified that HDMI port 1 works when connected to something other than the computer.

 

[COLGeek]

Does swapping the order of the connections on the GPU side "move" the problem?

 

[TipsyMcStagger]

Does swapping the order of the connections on the GPU side "move" the problem?

I'm traveling for the next week, so I'm not able to do any troubleshooting until I return but to be sure I understand your question, are you suggesting I connect the HDMI cable to the unresponsive port on the monitor (Port 1) and then disconnect the other end at the MB and then reconnect?

 

[COLGeek]

I'm traveling for the next week, so I'm not able to do any troubleshooting until I return but to be sure I understand your question, are you suggesting I connect the HDMI cable to the unresponsive port on the monitor (Port 1) and then disconnect the other end at the MB and then reconnect?

I am suggesting to change the connection order on your GPU (swap cables into different ports) to see if the problem "moves".

 

[TipsyMcStagger]

I am suggesting to change the connection order on your GPU (swap cables into different ports) to see if the problem "moves".

I'm back from traveling and I'm a little embarrassed to admit I don't follow your suggestion. The computer only has a single HDMI port for video. I'm using the MB's on-board graphics. There is no graphics card plugged into the MB.