Sometimes the car radio refused to power no,to fix this you have to make sure the battery of the car is fully charged.check the red positive cable if it has been removed or unplugged from the battery.check the fuse that supply power from the battery to the car radio by consulting the vehicles owner manual to check the exact location of the fuse box.replace the fuse with the same value.check if the power switch control is functioning OK otherwise it will prevent the flow of current to the circuit.
finally there is a power diode located inside the power pack that regulates the voltage,if the diode has a short circuit it will blow off the power fuse so check it and replace with the same value.
This error comes out in different ways, in a situation whereby the CD plate has a scratched or it contains dirt's on the surface meaning that the laser-lens cannot read the information on the disc.It also display such error when the CD plate has stocked inside the tray or mechanism. Finally the laser-lens might be bad and needs replacement.
HOW CAN I FIX THE ERROR
Clean the CD plates with a denatured alcohol and make sure the surface is smooth to avoid cracking or error display.cleanup the laser-lens with a lens cleaner and always keep it dry.
CASSETTE NOT PLAYING
Check the cassette play-head and clean it regularly with head cleaner to avoid dirt. Service the pinch rollers by cleaning it with a denatured alcohol to allow the free movement of the tape through the flywheels.If you want to replace the cassette robbers then follow the following steps.
First of all remove the outer cover of the car stereo then go straight to the mechanism and unscrew it both from the top and bottom.Bring out the mechanism then replace the rubber that connects the flywheel and the motor roller,After replacing it with a new robber screw it back and text it before covering the outer cover of the car stereo.Note, always remove the positive terminal of the car stereo from the car battery before troubleshooting.