Audio :: No Sound From Speaker / Headphones / Can't Find Any Errors

A couple of days ago, I decided to move my tower from my desk to the floor. Everything was working beautifully up until then. I opened it up and removed some dust. After putting it back together, the monitor wouldn't register anything. I left it for a day, came back, and the monitor magically worked again. The wifi card stopped working, but importantly, the sound was working. After leaving it for a night, I came back, reseated the wifi card, and magically, the card worked again. But now, the sound won't work! It's been several days, and this is the situation:

* The sound is not muted. When I press the speaker icon in the tray, the green volume bar moves up and down, as though sound is playing

* If I troubleshoot the 'playing audio', it says that no peripherals are plugged in. I found that if I went into Realtek HD Audio Manager and disabled 'front panel jack detection' in the connection settings, the computer suddenly apparently realises that I do have speakers connected, and when I troubleshoot audio again, it doesn't find any errors. I have to do this every time I restart, but the sound still doesn't work.

* I've downloaded and reinstalled the Realtek HD Codecs twice.

* In Device Manager, it recognises the integrated sound card:

(the PCI Simple Communications Controller device is Intel Management Engine Interface)

* I've disabled and enabled the devices many times, but no dice.

* I've reinstalled the chipset drivers from the motherboard manufacturer

* I've gone into my computer and unplugged and re-plugged any wires that may have come loose.

It's the holidays, and I want to immerse myself in video games. But that's pretty much impossible with no sound .