What is the repair method for Audi A4L black screen?
2 Answers
Check if the original car fuse is blown. If the fuse is blown, replace it; Check if the fuse at the rear of the navigation system is blown. If blown, replace it. Switch interfaces, tap the touchscreen with your finger to see if the touch responds normally, then inspect the touch circuit to confirm there are no issues with the wiring.
Last time my Audi A4L also suddenly had a black screen, took me quite a while to fix it. The key is first identifying whether it's the infotainment system or instrument cluster that's blacked out - these require completely different approaches. I've personally tried forcing a reboot by long-pressing the volume knob, which solves most software freeze issues. If restarting doesn't work, then check the fuses - look for the corresponding 20A fuse in the fuse box behind the glove compartment on the passenger side, and use tweezers to pull it out to check for burnout. Also remember to inspect the wiring harness connectors behind the head unit, as Audis are prone to poor contact. Be extra cautious if it's the instrument cluster - pull over immediately as it might indicate driving data interruption. If all else fails, don't push your luck - just tow it to the dealership for system reprogramming or module replacement, electronic faults are beyond DIY fixes.
