I have an Element flat screen TV set up as my monitor for my mom's Acer Aspire AXC-60G3G Desktop PC running Windows 10. The sound was working fine about a month or 2 ago, but now it's not working anymore. I have checked the volume levels, and they all say it's muted but when I go to change the volume, it says it's not muted. However, on the taskbar where the speaker icon, it says that sound is muted. I have checked the connections, and everything seems to be plugged in properly. I will continue to troubleshoot the issue on my own unless someone comes up with a different solution.