Yes, I've been through all the loops trying to fix my on-board sound (I've reinstalled windows and all my drivers, reset my BIOS settings, tried all the audio ports on my computer...). I'm pretty sure it's a hardware issue.
I'd like to add on a few things. When I plug in my speakers to the audio jack, my RealTek audio drivers recognize that a device has been plugged in (even recognizing that it's on the back port) and asks if it is speakers or headphones. However no sound is produced when I do a sound test on the volume bar. The problem is not my speakers, I tested them with some music on my phone.