Question about Pioneer DEH-P8500MP CD Player

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Unit opens and closes on its own

This just started a week ago: I start the car, and the unit opens and closes on its own and the only way I can get it to work is to make sure there's a cd inserted and I hold the switch button down to 'trick' the system. Then I can choose to play the cd or the radio. Any help? Sure do appreciate it.

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Re: Unit opens and closes on its own

I think I got the second half of the solution for this problem. Please look at post "Unit powers down when motorized face opens" for a solution. Seems like we need to buy the ribbon that connects to the face plate to fix this problem.

Posted on Feb 08, 2008

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My JVC car stereo will let me listen to the radio but when i put in a cd it wont play and 00:0000 AY flashes constantly. It started a week ago... have i pressed a wrong button?

I had the same problem, it occurred after my battery had run flat. To fix it you need to reset the unit. To do this, remove the clip-off fascia, and on the main body of the unit there small hole, just to the left of the connector. Push a narrow pointed object such as a pen nib into this hold until you feel the click. The unit is now reset and should be working properly. You'll have to retune your saved radio stations, but the cd player should now be working.


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My pioneer deh-p8450mp is opening and closing/switching on and off contiuously. help

Hey sparrow, sorry you didn't get an answer to this sooner, mine just started doing the same thing. After fidling and dismantling for an hour or so I think I have diagnosed it to being the ribbon cable which comes from the circuit board to the front most control panel is cracked (i.e. the cable that connects to the connectors on the removable face plate) When the panel attempts to open fully the ribbon cable is flexed enough to lose connections making the unit think the faceplate has been removed and so attempts to close...when it closes the connectors retouch causing it to think it needs to reopen....this is a nasty design flaw for a unit that cost me $1500 (admitedly 10 years ago but it was in a box in the cupboard for 8 of those years) !!!! Now any chance I can source this $2 part .....eek

Oct 03, 2009 | Pioneer DEH-P8400MP CD Player

1 Answer

Pioneer DEH-P850MP Features quit working when opened

those radios have a ribbon wire that breaks on them this is why it doesn't respond to your commands. and and or sells the ribbon wires. the wire is located inback of the part where the faceplate hooks up can see silver ovals on a black rectangle where the faceplate makes contact. that is the part.

Jun 08, 2009 | Pioneer DEH-P850MP CD Player

7 Answers

CD player and everything works fine but there is no display .....

Well, my display went out earlier this week. Took it apart and found out that the LCD on the 501dpx was burnt out. I also found out all we have to do is replace the whole faceplate instead of the system

Jan 06, 2008 | Kenwood DPX-501 CD Player

2 Answers

Pioneer powers off when face plate opens.

My first guess would be that the ribbon cable between the flip face and the mother board has gone bad. This is a very, very common problem. I'd suspect that above everything else at this point.

Jan 03, 2008 | Car Audio Receivers

1 Answer

Inside buttons do not function at all.

The problem with you radio is the ribbon cable,this part connects the face to the main get it from
parts number is 168795211
you can try to replace it by you own,just becareful with the front button because they may fall dow when you open the face.

Nov 17, 2007 | Sony CDX-M800 CD Player

1 Answer

Will power up,will hide, will open on igntion start

yup.. needs a new face plate ribbon cable.. just like mine :-(

Sep 24, 2007 | Kenwood KDC-716S CD Player

1 Answer


dirty,clean the optical pick-up?

Apr 30, 2007 | JVC Sirius KD-LH300 CD Player

2 Answers

Unit powers down when motorized face opens

i also have had this unit for over four years. the exact same thing just happened to me yesterday. i was thinking maybe it is the motor that opens the face. has anyone found an exact solution for this problem yet?

Apr 11, 2007 | Pioneer DEH-P8500MP CD Player

1 Answer

Cold Blooded Stereo

Switch the input wires from the sub to the speaker amp and vis versa. See if the problem switches to the other amp. If it does, you know you have a fault in the head unit. If it stays in the same amp, then you know you have a problem in the amp unit. Check with the manuufacturer online about how long the warranty is on each unit. Maybe they are still covered. Good Luck Please do not forget to rate this thread.

Nov 26, 2006 | Alpine CDA-9856 CD Player

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