Question about Sony CDX-3100 CD Changer

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Sony CDX-3100 - Unit keeps resetting

Hi, I wonder if you can help - I've just taken my Sony CDX-3100 head unit out of my old car and fitted it into a new one. The unit worked fine in my other car, no problems, but since I refitted it, it no longer stores any of my EQ settings or stored radio stations. I set everything up, but next time I switch the ignition back on, the CD gets ejected and all the settings and memories are reset to default.
I followed the instructions in the manual - when I installed it, I pressed the small reset button but this doesn't seem to have done any good. I have unplugged the unit, re-plugged it, then pressed reset but with no joy.

Any help gratefully received

Cheers
Dan Trussler

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i resolved this myself in the end.
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I turned the engine off and stereo off as well.
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OK. Here's the deal. There are two "power" input lines. A RED and a YELLOW. RED should be connected to your vehicles' ignition or key switch. YELLOW should be connected to a "constant" power supply directly from the battery.
If you have a test light, you should be able to find both at the fuse box. Just clip the alligator clip to the frame somewhere or to the edge of the cigarette lighter and probe the fuse box turning the switch off and on respectively. (test lights are very inexpensive, about 4 or 5 bucks at the auto parts store).
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SOURCE: Sony CDX-M600R car radio CD: Radio does not work,

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there is a reset button the the converter box that all the wires go into.

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