Question about Pioneer DEH-P4800MP CD Player
While you may read over a million answers to this problem, try this one first:
With the KEY ON, POWER THE UNIT OFF, by pushing the volume button IN for 3 seconds.
After power is off and key is STILL ON, press and hold the volume button AGAIN for 3 FULL SECONDS. The elusive "Initial" settings should reappear at this point. To get out of INITIAL SETTINGS, simply press again for THREE SECONDS, or press "BAND" to "escape"...
You will need to turn ON the AUX1 or AUX2 functions (or both depending on any other installed items) in this menu to allow it to work.
I hope this helps.
Posted on Oct 07, 2008
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Posted on Jan 02, 2017
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Best guess is that your source button or whichever button changes from cd, to Tuner, to usb, to Card, is shorted, and needs cleaning. Its like the button is always pushed.
see if you can carefully dsiassembly the reciever to get to the circuit board behind the button I speak of, and clean it.
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