Question about Pioneer DEH-P840MP CD Player

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Pioneer deh-p840mp weird concern

I just got this radio from a friend and it worked fine for a couple days. problem being is that while you are listening to anything on the head unit all the display on both screens goes blank as if not turned on and none of the buttons work however i can still get audio. but when i turn off my car and turn it back on the unit is just dead. i know i have power because the radio still chimes when the ignitoion is turned off. it did come back after a little while almost like it was overheating and just needed to cool. But it does this issue all over again. any ideas???

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This is a problem that is caused by the ribbon cable that connects the two faces going bad - you can find repair kits for this unit on ebay.. just search DEH-P840MP and you will find "ribbon kits" or repair kits. They are usually about 15 dollars.

Posted on Jan 17, 2009

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My pioneer deh-p840mp powers on and flips open, and seems to function fine with the exception of no sound going to all my door speakers and the bass to my subwoofers is a far sounding muffle even as I turn...


Un hook all your speakers that the deck is powering and hook them up one by one sounds like u have a shorted speaker or wire and the unit is going into protection.The best way to chk the speakers and wires is with an ohm meter . Check each speaker wire to ground and across the speaker and see iof you have any shorts. The next step woulk be to remove the unit and have it bench tested.

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Most automotive audio stores sell them. Also, Auto Zone sells installation kits.

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THERE IS A RIBBON CABLE THAT CONNECTS THE FACE PLATES TO THE RADIO THAT NEEDS TO BE REPLACED

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PIONEER SELLS THE FACE PLATE RIBBON CABLE

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1 Answer

Wire harness


You can purchase it from Pioneer Directly.

Here it is;

http://parts.pioneerelectronics.com/part.asp?productNum=CDE6563



Best of Luck.

Oct 31, 2007 | Pioneer DEH-P840MP CD Player

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