There could be a few different things causing the issue. Here are a few things you can check:
Volume: Make sure that the volume is turned up and that the mute function is not engaged.
Fuses: Check the fuses that control the audio system. If a fuse has blown, it will need to be replaced.
Radio controls: Make sure that the radio controls are functioning properly. If the controls are damaged, they will need to be replaced.
Speakers: Make sure that all of the speakers are securely connected and that there is no damage to the speaker wires. If a speaker is damaged, it will need to be replaced.
Radio head unit: If all of the above items have been checked and the issue is still not resolved, the radio head unit may need to be repaired or replaced.
Volume: Make sure that the volume is turned up and that the mute function is not engaged.
Fuses: Check the fuses that control the audio system. If a fuse has blown, it will need to be replaced.
Radio controls: Make sure that the radio controls are functioning properly. If the controls are damaged, they will need to be replaced.
Speakers: Make sure that all of the speakers are securely connected and that there is no damage to the speaker wires. If a speaker is damaged, it will need to be replaced.
Radio head unit: If all of the above items have been checked and the issue is still not resolved, the radio head unit may need to be repaired or replaced.