On the if all the factory radio functions are working perfectly — screen display, reverse camera, touch control, Bluetooth, navigation, AC display — but there is no sound output, the problem is usually from one of these areas:
Factory Amplifier fault
The LX 570 uses a separate amplifier.
Once the amplifier stops working, every function can still display normally but no audio will come out from the speakers.
Amplifier power supply issue
Blown fuse
Weak ground connection
No ACC power reaching the amplifier
MOST fiber optic communication problem
Lexus premium systems use fiber optic cables between the radio and amplifier.
If the fiber loop is broken or disconnected, audio will stop completely.
Audio IC problem inside the factory radio
The screen and controls may work but the sound processor/audio section inside the radio can fail.
Muted amplifier due to software or CAN communication fault
Sometimes after battery issues or electrical repairs, the amplifier stays muted electronically.
Water or moisture damage
On some LX 570 models, moisture under the seat can damage the factory amplifier.
Common Symptoms:
Reverse camera still working ✅
Touchscreen working ✅
Radio stations changing ✅
Bluetooth connecting ✅
No sound from all speakers ❌
First Things to Check:
Check RADIO/AMP fuse
Restart the vehicle battery for 10 minutes
Check if amplifier is receiving power
Scan the audio system with diagnostic tool
Inspect fiber optic cable light signal
In many cases on the 2016 LX 570, the main issue is either:
Factory amplifier failure o
Audio section fault inside the factory radio unit.
For Your Car Radio Call Engr Yomi of All About Car Radio ☎️ 08036922877
#lexus
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