DEH-P690UB Wont Eject or Open

Improper power..ground..check yellow and red wires for good connection. Use heat shrink ..solder..take time..recheck everything u have done thus far and ensure faceplate is securely on front of unit

The flexible cable that goes from the face to the main motherboard may be bad.

Try the reset button behind the faceplate. Here's the manual just in case.
http://www.pioneerelectronics.com/pio/pe/images/portal/cit_11221/283120138DEHP6800MPOperationManual.pdf

check fuse at back of unit. also pull the plug out of the head unit & check for power at the pins in the plug that fits to the unit.

it sound like you have a broken ribbon cable. it is a part that needs to be replaced professionally.

Check in the front and you should see a small hole thats about the same diameter as a paper clip. Open up a paperclip to a straight 2 inches and poke it through the hole. It should release the door so you can get it open or at least seat the cd if thats whats making it not open.

An install gone bad. Something is hindering free movement of the face plate open mechanism. Closely inspect the top edge of the bezel, is the face plate trim ( thin plastic ornamental frame covering the ugly aluminium mounting sleeve) snapped securely back in place? has it been fitted upside down?, is it deformed?.

Had the same problem twice already.

Took it in for service and they charged me 125.00 (USD) to replace the ribbon cable on the inside.

I saved the $$$ and did it myself the second time.

The cable is located here on the Pioneer Website. It comes with instructions and no special tools are needed.

http://parts.pioneerelectronics.com/part.asp?productNum=GXY1005




Best of Luck.

make sure that you have power not only to the red wire but also the yellow wire... one is battery power the othe ris ignition on power. If it only is getting one power it might not think the ignition key is on.. also maks sure there is not a reset button somewhere that you can press with a pen...

Look for a tiny, recessed Reset button on the front of the unit with the face removed. Press this button with a pen tip; it should spit out the CD and work correctly afterwards. This will also erase your station presets and audio settings.