Sony CDX-MP40 only works after hitting reset button
I just purchased a used car already equipped with the cdx-mp40. The only way I can get the cd player to function though is to hit the reset button after my car is started. In other words, I get in my car, turn it on, put the faceplate on and nothing happens. But when I get in, turn on the car, hit the reset button, put the faceplate on everything works normal. Any ideas? I hate having to reset the cd player each time and I'd like to keep the stations that are already programmed in my cd players memory.
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You will need an expert technician to open the unit, they are small bulbs with covered color lenses, usually small plastic caps. the simplies is to remove this caps and mark it with colored felt tips marker
If song tracks jump or skip then it is problem of cd player like optical laser is dirty / clogged, and if track doesn't jump or restarts in middle of playing back then cd player is just fine, Please check cd creator software settings.
Some Sony head units let you use the Bus audio inputs as an auxiliary source input, but yours is not among them. To play your iPod through the head unit, you'll either need an iPod interface module: http://www.xplodsony.com/xplod/accessories/XA-110IP
or an auxiliary input module: http://www.xplodsony.com/xplod/accessories/XA-300
The iPod interface will allow you to control and display the iPod directly through the head unit, while an auxiliary input adapter will allow the iPod to play through the head unit using the iPod's controls and display.
You are correct, the unit powers entirely from the red and yellow leads. Your symptoms sound like a unit that isn't getting power on the red (switched) lead. The most likely cause is a blown fuse in your vehicle's fuse box.
You can get a manual here http://esupport.sony.com/perl/select-system.pl?DIRECTOR=DOCS Your unit sounds like its dead. Try unplugging it for a day or overnight. if that dosent work your going to need to take the unit into the repair center. Good Luck