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This is due to one of the IDE devices inside (Hard Drive or DVD drive) not sending the requires "I am Ready" signal to the main board while the DVR does a power on self test. With the hundreds of units I have come across, 99% of the time it is due to a faulty DVD drive. These "Loader" brand DVD drives were on the cheap and when they give out, the unit does not go past the Hello. You can verify this by replacing the the DVD drive with any other DVD burner or DVD drive or even a CD drive that comes from a computer (IDE connector). The only fix for this is to replace the drive or simply connect an old CD drive inside and not use the DVD properties of the DVR, only the hard disk recording/playback.
Several possible causes
1. Laser read lens dirty - clean it
2. CD has become damaged & data cannot be read (does it read in other cd drives?)
3. Intermittent malfunction of laser read circuitry.
4. Process of elimination - if CD is readable on other drives, the problem is with DVD player. If cleaning does not solve the problem, the problem is DVD internal electronics.
Did it just stop working one day, or did you move it, use it differently, etc?
Sounds like your reader/tray might be bad, but could also be a faulty circuit which may have shorted out. If your handy with a multimeter, you might be able to trouble shoot it. Make sure there is nothing lodge in there, and when you opened it up, did you see any broken pieces from the tray? Sometimes the teeth on the gears crack and break off, so check that also. You can't miss the gears, this is what allows the CD to move in/out of the unit.
The dual zone control on the KD-AVX1 is only for playback of two seperate devices.For example an audio cd or dvd in the head unit is played through the front speakers and an external device like an i-pod,cd changer or any other AV device will play through the rear speakers.Either way you need an external audio or AV device for the dual zone to work.I hope this helps.. Good luck..