Mine works again!!!
I removed the battery from the car, because I planned to change it. The KD-G421 worked all fine, after I connected the battery again.
So I would say, that the problem, at least in my case, was resolved by removing the radio from the power supply and connecting to a +12V batterie again. Allow 1/2 hour of power supply removal.
The root cause of the problem may be a voltage drop below 12V, which might delete some internal memory, although the radio receives and plays still music at lower voltage. After disconnection from the power supply, the radio starts up in the Demo mode again...
Hope this helps / Patrick
My dad is blind and to reduce the boredom is listens to a small CD player continuously. It has quit playing the CD's and he has even tried CDs that he had previously listened to but they do not play either. The CDs are spinning but there isn't any sound.
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This is a common error with these units when they get dusty from putting dirty disks inside the drive. Just go to your local staples and or walmart and get a 5 dollar disk player cleaning kit. It looks like a plain cd but has small fibers that come out of the bottom of the disc that clean the laser as it spins and tries to read it.
Okay, I'm assuming that you were sucessful in resetting your radio code.
I'm also assuming that you have a CD player (which may not be the case).
The flashing clock also functions as an error code indicator. It should say something, indicating what the error is. You can't set the clock until the error is resolved (a disc stuck in the CD player, for example, on no disc in the CD when it's been told to play).
The procedure is as follows (which you probably know): The audio system display usually shows the time when the ignition switch is in ACCESSORY (I) or ON (II). It shows the operation mode of the radio, cassette player, or optional CD player/changer when you operate them, then goes back to the time display after five seconds. If an error occurs while operating the optional CD player or changer, the display will keep showing the error code and will not switch to the time display until the error is corrected.You can set the time only when the clock is displayed. To set the hours, press the H (Preset 4) button while pressing the CLOCK (SCAN/RPT) button. Press and hold the H button until the hour advances to the desired time.
To set the minutes, press the M (Preset 5) button while pressing the CLOCK (SCAN/RPT) button. Press and hold the M button until the minutes numbers advance to the desired time.
If you don't have a CD player, or no error is showing in the clock read-out, leave a comment so I can investigate further.
Hope this helps you.
If you really enjoy the head unit call pioneer, there customer service is great and before you fork out another $300 for a new unit why not hear what they have to offer. Some companies have refurbed units ready to ship, just an option.
I've had a friend to stay who had this problem. I downloaded the user manual from the internet and the error code is not mentioned. I followed the procedure to reset the radio and this solved the problem.
Take the cover off the stereo and locate the small hole (towards the centre) which houses the reset switch. Insert something like a paper clip into the hole and hold for a few seconds. Then replace the cover and all should work. You'll loose all the radio presets.
Do you have a code that you had to enter to unlock the stereo? Have you tried to reset the stereo? Look in your owner's manual and look for a "RESET" button. If you don't have the manual, you can download one from pioneerelectronics.com.. Hope this helps...