When all of the speakers in a car audio system all stop working at once, the problem is usually in the head unit, in the amp, or in the wiring . In some cases, an issue with the wiring between the head unit and a single speaker can even cause all of the speakers in an entire car audio system to cut out at once. Have a Kenwood DNX 7100 that has stopped working. Power getting to unit but will not turn on. Is installed in my motorhome. Was in New Orleans last week and had bad thunder and lighting. Can unit be d … read more In this case, the incoming call list of KENWOOD Bluetooth Products cannot be used for making a call. ・ There are models which cannot make a call unless the standby display is shown. ・ If connection with the cell-phone cannot be made, restart the cell-phone. ・ Do not turn off the Head Unit while transferring the phone book. Suppose the head unit of the car is malfunctioning. In that case, it invites a bulk of problems including distortion, lack of range, No vibration, radio malfunctioning, minor damages, popping sound, clipping, stereo gets turned on and off repeatedly, and amp stops working. A range of problems can occur with the head unit, so the solutions are Unpair phone from head unit. Plug in the GPS antenna to the head unit (it was not plugged in). Set the time zone on the head unit to the same time zone that my phone is set on (it was not set). Verify the Wi-Fi on the head unit is turned on ("Wireless Settings: Smartphone -> Access point" was on already). We can confirm that support for Pioneer and JVC-Kenwood car audio head units has been deprecated. This means it will no longer be possible to launch the built-in Spotify app from the interface, but you should still be able to play audio from your mobile devices via Bluetooth or through a USB cable. Thanks for understanding. 60 posts · Joined 2008. #6 · Mar 24, 2011. This was an issue w/ the 9960 & 7160, however the 1.5 update supposedly fixed this. (possibly on other units as well) Kenwoods' fix was to make it so the volume increases by only one level everytime you touch the little button. Lots of people have bitched and moaned about this on here: Anyhow I swapped out 3 different amps (Alpine pdx-f4, Alpine x-70f, US Acoustics usx-4085 and JL Audio HD600) that are decent and clean and the problem persists. One of the installers at my current shop kept saying the problem more than likely is with my Kenwood DDX9903s head unit. The owner didn’t think it was the issue as they checked the uuKZjD7.