Public Address - Despite volume control of all sources, I have no sound

Amplifer :

• GGM PAKIT4S

Despite volume control of all sources, I have no sound :

Check the general audio level of the amplifier carefully, in 2 ways :

- Via the Remote Control:

A long press is used to check this level U00 to U10

- Via Amplifer : 

 >>|  for Volume up

| << for Volume Down