Suspected sound card failure - any way to diagnose?

[anapple1]

I suspect a sound card which has failed on my HP Envy 15, as I get no audio through speakers or headphones. Both in Windows 10 and in Ubuntu, I get no sound card/no audio devices detected. Is there any way to run hardware diagnostics on my laptop to confirm whether it is a hardware issue, or whether it's a software problem?

[Huffer]

You should be able to go into diagnostics (F2) as you power up. But if no sound in both Windows and Linux I think you have already diagnosed it. 

[anapple1]

I ran the diagnostics a few times, it passed once, failed twice, then the diagnostics refused to run, stating that the audio diagnostic was not supported on my system...? I presume this means there's a dodgy connection between the sound card and the mobo?

[Huffer · Accepted solution]

It is soldered to the motherboard so if the connection is dodgy it is going to mean a new motherboard to have sound. You can use a usb soundcard dongle and headphones is about the only workaround.