Question PC Audio Jacks not working

[Ljac95]

After doing some recent work on my PC (installing a custom water loop) when restarting it I have found that none of my audio jacks work, the rear audio jack that plugs straight into the mother board will show as working on windows but not out put any sound and my headphones jack at the front will produce sound but also a huge amount of static interference. I have test both on the monitor headphone jack which uses Nvidia High definition audio instead of Realtek and they work fine so I'm confident it's not the devices. I have tried reinstalling the drivers and have checked the HD audio cable is connected properly. At this point I can't think what else it could be?

 

[mortemas]

Try disconnecting the front panel audio at the motherboard header and see if the rear audio works. There could be a short somewhere along that path.

 

[Ljac95]

Try disconnecting the front panel audio at the motherboard header and see if the rear audio works. There could be a short somewhere along that path.

Try disconnecting the front panel audio at the motherboard header and see if the rear audio works. There could be a short somewhere along that path.

Ill give this a go, I think I may also have a spare cable that I can try to just to rule that out too

 

[Ljac95]

The SPDIF optical out jack is always lit - that's what sends the light down the toslink cable. The mere fact that it's lit doesn't tell us anything about whether there's a problem with the audio line out jack. However, if you can get a working signal from the optical output it would be a good sign that the digital audio device is working.

If Windows is not reporting any problems with the audio output devices, then the problem lies with the amplifier circuit which is very late in the "signal chain" and most likely invisible to Windows (IE: the digital audio chip is functioning properly and its output then moves along to the analog amplifier (speaker/headphone/etc outputs) and that's where the problem lies).

Did you accidentally knock off any components related to the analog audio circuits, like audio capacitors or other related components maybe?

Can you describe more about the 3 pin connection mentioned earlier? Are either of those sides related to audio?

I didn’t know anything off and there is no physical evidence of any damage. The 3 pin connection is a jumper which switches the 3 pin DRGB header from 5V to 12V. I thought it was just a 3 pin rgb header and so I plugged the d rgb cable for the water block into it. When I switched on the PSU all the rgb flashes for a second then went off. I was then able to post the system as normal and it was only when I tried to use the speakers I noticed the issue

 

[Ljac95]

I have tried running it without the front panel audio connected but there is still no output from the rear audio jacks