Why does the Audi A4L screen suddenly go black?

[DelGabriela]

Here are the reasons why the Audi A4L screen suddenly goes black: 1. The car linkage is disconnected, poor contact; the battery is depleted; the battery terminal is detached. 2. The host crashes due to cold weather or insufficient memory; the main circuit or main fuse is burned or damaged, etc. Here are the detection methods for the Audi A4L screen suddenly going black: 1. Completely black screen and no power: Check if the car's original fuse is blown. 2. Black screen but sound is normal: Switch to a familiar interface, tap the touchscreen with your hand to see if there is any touch response.