Troubleshooting audio input on monitor speakers when connected via HDMI
Posted on 2012-03-24
I have an Acer D241H monitor, which has built-in speakers. This monitor has a VGA and HDMI input as well as audio in (and audio out/mic). I am having trouble with the audio input when connected to my tower via HDMI.
This setup has worked before when connected straight HDMI from the tower to the monitor (also audio cable). At one point, the speakers on the monitor stopped working and Acer support had me perform a "power drain", which they claim is for eliminating "static electricity". This did resolve the problem at that time, but it has happened again. However, this time I'm using a different video card that only has DVI output, so where-as before I was connecting to the tower via direct HDMI->HDMI, now I am going from DVI->HDMI.
I have contacted Acer support again and they said there is a configuration problem with the tower but would not elaborate on the details. Here is what I know:
- Connecting via VGA allows the sound to work. I connected the monitor to my laptop via VGA and connected the audio cable: monitor sound worked; I unplugged the audio from the laptop (VGA remained connected), plugged audio into the tower, and sound worked from the tower
- The audio cable is working as it allowed sound to work from the monitor via both the laptop and tower (as long as the monitor only had the VGA cable connected)
- Connecting a different speaker system/headphones works from the tower (both front and back audio ports), so I know the ports are supplying audio; further, the fact that the tower sound was transmitted when the laptop was connected via VGA tells me the tower is supplying audio
- Connecting the video DVI->HDMI does not work even after the "power drain" with the audio cable connected from tower to monitor
I need assistance in troubleshooting the problem either from the tower or possibly to the monitor (at least confirming the monitor is the issue). I am still under warranty for the monitor, though Acer says they will only repair, not replace. The monitor is great otherwise, but I do want to use the built-in speakers as it was a selling point for me instead of the headphones I have to use now.
Any suggestions to troubleshoot, or perhaps any thought as to what configuration elements need to be checked on the tower? The audio is built-in to the motherboard and as far as I can tell, drivers are up-to-date, other than that, I don't know what to check as far as the tower is concerned. It seems to me that it's a problem with the audio connection in conjunction with the HDMI->DIV connection, which I know that HDMI can supply audio but DVI cannot, however the answer is eluding me.
Thanks for any suggestions you can offer.