There are 5 levels of sound available on your monitor – LO, L1, L2, L3, L4, L5.
When you turn the sound down to LO this is similar to MUTE and you will not hear any sound.
The icon flashes to indicate this.
If you wish to hear sound please adjust the level to L1 or above and the sound icon will cease flashing and sound will be transmitted.
If you have any further queries please do let us know.