Ok, this is what sometimes happens to my Kenwood KDC-X592:
when I detach the faceplate, and then I reattach it, sometimes the blue lights flash quickly. Then I press the Source button, and then any blue light stays on and a single dot or parts of the screen light up for 1 second or so, then the unit turns off and turns on back again and works completely normal.
What I do to avoid this is to wait until all lights are gone when I shut down the unit and then detach the faceplate.
Has this situation happened to any of you guys (who have this unit)?
If so, does this mean my unit is bad or what do you guys think is happening?