Iiyama ProLite E383 User Manual page 25

Problem
No sound.
*F
The sound is too
*G
loud or too quiet.
A strange noise is
*H
heard.
*Availabele for ProLite E383S only
The audio equipment (computer etc.) is ON.
The Audio Cable is properly connected.
The Volume is turned up.
The Mute is OFF.
The audio output level of the audio equipment is within the specification of
the monitor.
The audio output level of the audio equipment is within the specification of
the monitor.
The Audio Cable is properly connected.
Check
TROUBLE SHOOTING 19