iiyama G-Master - no sound

[cgard88]

Hi all. I'm new here, and with an issue I've never come across before. I've got an iiyama G-Master GB2770QSU-B1 27 Inch Fast (FLC) IPS LCD and it won't play sound through the in-built speakers. I've connected the monitor to two different laptops, with various HDMIs and even the DP connector that came with it, but it won't play any sound. Having it as the main source of output in the Windows sound mixer shows me that it's registering that I'm playing media, but no sound is coming out. The monitor isn't muted.

Any help will be greatly appreciated.

Thanks