Question about Alpine CDA-7940

3 Answers

Face Plate My display is not working on my face plate. What can I do to fix this? Everything else works.

Posted by on

3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers
Re: Face Plate


Posted on Jan 15, 2010

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert who has answered 200 questions.

  • Expert
  • 218 Answers
Re: Face Plate

If this is a "flip face" type of display then you may have a broken lead in the ribbon cable that connects to the main board from the flip face. This is a very common problem. You'll need to replace that ribbon cable.

Posted on Mar 16, 2007

Re: Face Plate

Display OK lcd display is faded out. This is normal with time

Posted on Aug 20, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

My xdm6820 has no display showing. What do you sugest? Any ideas? It works fine but can not see clock or radio station. No display at all!!

There are two 3mm white LEDs inside the face-plate that need to be replaced. Remove the face-plate and turn it over. Remove the 4 screws in the corners. Un-snap the plastic back off the face-plate. This exposes the back of the printed circuit board. Pull the volume knob off the front of the face-plate. You may need to use a small screw driver to gently pry it up. Flip the face-plate back over and remove the one screw that's holding the printed circuit board in. Separate the printed circuit from the front of the face-plate. Be careful to not lose the spring for the push pin. Flip the printed circuit board over and you'll see a raised metal box surrounding the display. The one end of this metal box is covered in black tape. Remove this tape to revel a small cavity in the side of the metal box with two 3mm white LED in it. These are the 2 LEDs that need to be replaced. This cavity is so small there's not much working room. Note that the positive terminal for each of these LED is on the left and the negative terminal is on the right. Rather than un-soldering the old LEDs I found it easier to use a small pair of diagonal cutters to just cut their leads and then pull them out of the cavity. Leave enough of the old leads sticking up to solder the new LEDs to. Trim the leads of the new LEDs to the proper length, slide them into the cavity one at a time and solder their leads to the stubs of the old leads. Make sure you get the polarity correct. Put everything back together and you should be good to go. I hope this helps you out.

Dec 20, 2009 | Dual XDM-6820 CD Player

2 Answers

JVC KD -S680 needs help

maybe short circuit or similiar problem inside since its geting hot, probably not a problem with the faceplate I would remove the cd player from your car and take it to a professional for a diagnosis / repair estimate. Can't solve this one with text only.

Jun 18, 2008 | JVC KD-S680 CD Player

2 Answers

I have a Kenwood KDC MP532U. The face plate will not display.

it more than likely has bad solder connections inside the radio on some surface mount resistors usually located on the right front of the radio as it faces you.

Sep 16, 2009 | Car Audio Receivers

1 Answer

Display on kdc-mp638u not working

These units are pretty cut, and dry.. Basicly the only thing you can check for yourself is connection. If the connection between the face plate, and the deck is good, and tight then you have one of 2 problems.
1) Bad face plate. Fix= $90-$130

2) Bad connection to the board on the radio Fix $60-$120

There is however a VERY off chance the processor is jumbled up, and wont cost you a dime to do a cold reset, so give it a shot.

To reset this unit simply remove the face plate, and locate the rest button. It is very small, but easy to find. Just use an ink pen or something of similar size to push the button.

Aug 07, 2009 | Kenwood KDC-MP638U Car CD/ MP3 Player

2 Answers

I have no display lights on my dual xdm6820 car radio. It does work but I can't see any words or graphics on the front of the unit. Can you tell me what is wrong?

if you have connected all the wires correctly you probably have a faulty dash,
If it is a removable face take it off and clean the terminals and re connect.
Hope this helps

May 07, 2009 | Dual XDM-6820 CD Player

1 Answer

Alpine 7835 display lights not working, everything else is fine

if it's not under warranty, I would advise taking the face plate apart and checking for burned spots on the board and using compressed air to remove anything that is conductive that may cause a short in the face plate. The face plate should be really easy to take apart.

Feb 10, 2009 | Alpine CDM-7835

2 Answers

Alpine CDA-9830 doesnt want to work

the cda 9830 and 9831 are known to have issues with the face plate connection that cause all kinds of issues. remove the face plate and clean the contacts on the face plate and the unit.

Feb 07, 2009 | Alpine CDA-9830 CD Player

1 Answer

KRC-703 display does not work, sound does?

Check to make sure the right face came with your unit, I had an alpine once that did the same thing when I accidentally grabbed my friends face plate. Everything worked but the LCD. Check the model numbers to compare

Jan 31, 2009 | Car Audio Receivers

1 Answer

Face plate buttons wont work

This is actually a common problem with more than just that radio. Sometimes the pins on the back of the face plate need to be cleaned. Take the face plate off, take a Q-tip and dip it lightly in some rubbing alcohol. Then use that to clean the metal pins on the back of the face plate. Make sure it is completely dry before you place the face plate back on. If this does not work, your better off replacing the whole thing.

Jan 20, 2009 | Alpine CDM-7874 CD Player

1 Answer

JVC KD -S680 needs help

all radios like your has two power inlets one is battery and the other is Acc or Ing. The battery line keeps power in the radio after you turn off your car both lines must work for the radio to turn on it sounds like a resister burn out thats why your face plate was warm.

Sep 25, 2006 | JVC KD-S680 CD Player

Not finding what you are looking for?
Alpine CDA-7940 Logo

262 people viewed this question

Ask a Question

Usually answered in minutes!

Top Alpine Car Audio Receivers Experts

xxxxxx xxx

Level 3 Expert

4679 Answers

Jose Velazquez
Jose Velazquez

Level 2 Expert

227 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you an Alpine Car Audio Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides