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Pioneer DEH-840MP & DEH-850MP Both Appear Dead

Discussion in 'Electronic Repair' started by techdrive, Jan 23, 2006.

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  1. techdrive

    techdrive Guest

    I have one each of these models in the shop with the exact same symptom.
    Both appear to be dead. In both cases if you hand wind the power face so
    it is open and then power the unit with 12 volts to the yellow and red
    wires, the face will close automatically. That is the only "sign of life".
    Neither of these units will respond to any buttons nor do you see the
    displays light up. Any help would be appreciated. Thanks, Mike
  2. You're going to need a schematic for sure!
  3. malice007

    malice007 Guest

    There is a service Bull on this. you will need to order the flex cable
    mod for the front panel.
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