Lost HDMI Sound after OS Restore

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socker_dad
socker_dad Member Posts: 1 New User

I have an TC-605 desktop which originally came with Windows 8.1.

 

After updgrading to Win 10, I experienced a lot of troubles with a couple of programs, so decided to go back to 8.1.  Fouled up several things and had to order a restore thumb drive.  

 

The restore went fine and I reinstalled the drivers for 8.1 64-bit from the Acer website.  However, when all was done, I had no sound.

 

Checked the Device Manager and found two entries for High Definition Audio - one was OK, the other had the deadly exclamation point.  Talked to Customer (lack of) Service and got no where.  I even tried an RCA jack between the back of the computer (the red X over the speaker icon went away) to my monitor (AOC 27 inch LED), but still no sound.  

 

The monitor is connected via the HDMI port.  Is there a driver for this port/function/whatever?  I just can't figure out how to get sound back!  Except for the startup bing, I don't even get any sounds from the PC's internal speaker.