All HDMI Out ports on 3 BenQ Monitors have lost their audio

If you have sound on monitor A, but none on monitor B, its an issue with the HDMI OUT. Or the cable going between the two.

I have no idea? The fact that you have audio on the first monitor in the chain means its not a PC or XBOX setting issue. If it was there would be no sound period.

Monitors don't really have drivers. Just definition files that list all the supported resolutions etc. Even then you don't need that. All you need to know is the correct native resolution to set it to.

EchoX860 said:

Not sure if it has anything to do with my issue, but when I did a factory reset of my PC (long before this issue even started) the monitor that I'm trying to get the audio out of into the elgato said Generic Non PnP Monitor before putting the CD in and updating the "drivers" via the disc

That doesn't factor into this issue. The video card driver determines if you get the proper signals out of the HDMI port. And that works or you wouldn't get video and sound on the monitor. Same deal for the XBOX. Its GPU driver is what handles the signal out of its HDMI port.

DVI is Video only, if they adhere to the standard. Have you've changed something between when it worked and when it didn't, connection wise? Or added another piece of equipment to the chain?