Jumper Audio System Failure

Greetings! I remember dealing with audio gremlins in my Jumper, though I've got a diesel. From your description, it sounds awfully familiar. Did you check if the speakers themselves are okay? Back in my day, the problem was, that aftermarket speaker was badly shielded and interfered with the radio waves. Although I have to admit that this is a long shot and it's probably the factory head unit failing. If you have access to a multimeter, test the voltage on the power cable of the radio. Is the voltage present? This will determine whether the display module has failed, or if it's a cable issue.

Thanks for the tip! I haven't checked the speakers themselves yet, I assumed that since there is no sound at all, it was more likely to be the head unit. Where exactly did you experience the radio interference on your aftermarket speakers? Could you specify exactly how to check it with a multimeter?

Ah, the memories! So, for me, the static came and went, depending on the engine's RPM. Very annoying. But if you have no sound, you're probably right, it's not the speakers. With the multimeter, set it to DC voltage mode (20V range should be fine). Then, with the ignition ON, carefully probe the power and ground wires going into the head unit. You should see around 12V. If you don't, there's a wiring problem. If you do, it's almost certainly the display unit itself. Given the error code you mentioned, and my past experience, I'd strongly recommend taking it to a workshop. My display defective was so deep, that I had to pay 725€.

Thank you for the detailed explanation! I appreciate the help. I'll check the voltage with a multimeter as you suggested, but it sounds like it's probably a defective display. I'll take it to a workshop to get it properly diagnosed and repaired.