Question Fresh Install Linux Mint 20.3 Cinnamon: Sound issues

[Linux4us]

Hi. I'm having issues with sound on my Linux OS. I have this version on 2 desktop PCs and the sound works fine on both. I have tried using this same OS with a mini PC connected to a TV monitor. I have no sound on the TV. I also tried it on another TV and no sound there either? I'm wondering if there is some difference with TV versus PC monitor? Any input on this matter would be greatly appreciated. Thanks in advance.