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Stereo Problem '91 Ls400


Cygnus

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The LCD display (but not backlight) and audio are not working, but the controls are.

If the stereo is off and I push the FM 1/2 button, the LCD backlight comes on and the antenna goes up.

If I push the volume (on/off) button, the LCD backlight goes out and the antenna goes down.

If I push the CD button, the LCD backlight comes on. If I push the disc button, the changer in the trunk switches disks.

Any ideas?

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Shameless bump.  Anybody seen these symptoms?

Mine did the same thing last year. Antenna worked, backlight worked, phone squelched thru speakers, but nothing else. I thought maybe after battery disconnect that I had a security lockout. Took it to dealer, thet said no, head unit died, sorry. I took it apart, and could find no visible fried circuits or broken connections. Bought a used unit on ebay for 50 bucks. Still working!

John

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