SRC button on faceplate doesn't work

Try applying double stick tape.

ok I just found this info online and they say it came from the service manual for that stereo so I hope it helps:

You will need a Kenwood RC-410 remote control. This remote works on KDC-519, KDC-X859, KDC-319, KDC-4019, KDC-MP919, KDC-X759, KDC-419, KDC-X459, KDC-MPV619, KDC-MPV7019, KDC-2022, KDC-2022V, KRC-435, KRC-535 and KDC-X959

To reset the code do the following:

1) Turn on the car.
2) The faceplate rotates out and the CODE - - - - prompt appears.
3) Press >>' and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)
4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>' key on the faceplate.
5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>' key on the faceplate.
6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>' key on the faceplate.
7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>' key on the faceplate.
8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc.

Above information source = http://techbybucky.blogspot.com/2008/01/how-to-reset-security-code-on-kenwood.html

Kenwood TDF42D Detachable Faceplate may be purchased here:


http://www.partstore.com/Part/Kenwood/Kenwood/KDC225MR/Kenwood/Kenwood/TDF42D/New.aspx

I would try cleaning the connectors on the face plate with an pencil eraser and on the unit itself with a very fine sand paper. And make sure you get rid of any dust after cleaning before putting the face plate back on.
Please leave me a good feedback.
Thanks

Me too. I ordered the new remote but can't find anything on how to sync it with the unit

You will need a Kenwood RC-410 remote control.
To reset the code do the following:

1) Turn on the car.
2) The faceplate rotates out and the CODE - - - - prompt appears.
3) Press >>| and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)
4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>| key on the faceplate.
5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>| key on the faceplate.
6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>| key on the faceplate.
7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>| key on the faceplate.
8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc.

You have to reset your system... Use a pen to push a small button that's located in the front of the face plate. That will reset the system...If it gets stuck on standby, just push the SRC button on the face plate or on the remote..

Kenwood Code reset for KDC-MPV7019: (remote required)

To reset the code do the following:

1) Turn on the car.
2) The faceplate rotates out and the CODE - - - - prompt appears.
3) Press >>| and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)
4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>| key on the faceplate.
5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>| key on the faceplate.
6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>| key on the faceplate.
7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>| key on the faceplate.
8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc.


MANUAL for the same radio

If You Have The Remote Here Is Your Solution.

1) Turn on the car.
2) The faceplate rotates out and the CODE - - - - prompt appears.
3) Press >>| and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)
4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>| key on the faceplate.
5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>| key on the faceplate.
6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>| key on the faceplate.
7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>| key on the faceplate.
8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc

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yo tengo un reproductor kenwood kdc-mp2035cr pero este no me reproduce nada solo me sale un mensaje que dice protect y no me deja hacer nada ni colocarle nada por el auxiliar