What is the issue when the car navigation screen is not lit but there is sound?

2 Answers
MartinRose
07/25/25 9:32am
The reasons why the car navigation screen is not lit but the sound and touch screen are functioning normally are: 1. The battery of the car navigation control display is damaged. 2. The power plug of the navigation display is loose. 3. The touch screen of the navigation display is damaged. Below are the solutions for when the car navigation screen is not lit but the sound and touch screen are functioning normally: 1. Check the stability of the car's power voltage: if it is stable, then inspect the cables on the back of the machine to see if there is an issue. 2. Check the touch circuit: confirm if there is a problem with the wiring. 3. Check the decoding chip or core module: determine if the decoding chip or core module is not working or is damaged.
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OTucker
08/11/25 7:22pm
The car navigation screen is not lit but there is sound. I've encountered this issue several times. First, check the fuse - it's common for the navigation system fuse to blow. Look for the fuse box location, usually near the driver's footwell, pull it out and try replacing it with a new one. If that's not the issue, consider that the screen backlight might be faulty - aging LED tubes in the LCD screen can cause a black screen while sound remains. Also check the settings - the screen brightness might have been accidentally dimmed, go into the system menu to adjust it brighter. Sometimes the system freezes, try restarting the navigation or resetting by disconnecting the battery. Checking for loose or broken wiring connections is also important - gently unplug and reconnect them. For prevention, try to avoid parking in direct sunlight to protect the screen. Get it fixed as soon as possible - compromising driving safety isn't worth it.
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