Question about Kenwood DNX7100 Car Video Player

1 Answer

The entire unit stop working

My car battery drained after leaving my car headlights on all night. Then, after recharging the battery and getting the car running again, my Kenwood video player/radio could not be turned back on. The entire unit is now dead; not even lit. Some people have told me that the unit may have a code which is needed in order to turn it back on. Is this true. Does anyone know how to turn the unit back on?

Posted by ebrighting on

  • codeman01 Nov 26, 2008

    so i have a very similar problem and it is driving me insane. i bought the dnx7100 in november of 2007 and had it installed im my 2004 VW GTI. everything was working great and i loved it, but i got rid of the car so i had it removed. i recently decided a year later to put it in my 2008 jeep wrangler. best buy hooked everything up, but they couldn't power the unit on at all, not even a light. they checked all of the conections with an amp meter and there was power all the way up to the unit, but it just will not power on for some reason. luckily i got an extended warranty, but before i send it back to kenwood i am going to call their technical support and see if they can trouble shoot me so i will post if i figure something out.

  • thatboyc1 Dec 04, 2008

    my kenwood is not powering up due to a code problm can you help me bypass are remove the code



1 Answer


Did you check all fuses already?

Posted on Dec 02, 2007


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2: Alternator: the voltage regulator inside alternator will drain battery when it quits working: break unit open, and replace the regulator: or replace the entire unit with a rebuilt alternator.

3: Loose alternator belt, which slips and does not allow for enough revolutions to fully charge the battery - especially at night-time, when you are running your headlights and such.

Now, to do a test, which will tell you if the alternator has failed, in 10 minutes:

1) Simply loosen, but Do Not Remove, the battery post clamps / cables, from battery.

2) Start Engine.

3) With engine running, REMOVE both cables from battery posts (engine should continue to run) (if it does not / dies out upon removal of cables, then test no further): ensure to secure the positive post cable - wrap it with a rag, or set it on cardboard or rubber, so it does not ground: then reach inside, and turn ON your headlights: upon doing so, and highlights are ignited, if the engine dies out - if the engine quits running the instant you turn your lights on, with the battery cable disconnected off - that means that the alternator is Not Charging; that it is not producing enough current to run itself / maintain itself running / maintain the engine running; so it does not produce enough electricity to keep your battery fully charged - and, is in fact, draining your battery of any available current which was stored in it.

So, more likely then not, it's the electronic regulator / diode stored inside of the large alternator unit: but, because, your car is a 1990, the brushes on your alternator are shot anyway; so you are better off just replacing the whole unit and belt: and battery if need be.

I hope this helps somewhat: where, with ENGINE RUNNING at normal / higher idle speed, and BATTERY DISCONNECTED, and ACCESSORIES RUNNING, especially headlights and heater - the Engine Must Remain ON / Running - on solely alternator power.

In that: the battery is only required to start the car; stored energy / current for the purpose of starting the car, as supplied by the alternator - and adjusted by the regulator: a faulty regulator will fry your battery, by over-charging / allowing too much electricity to flow.

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