If you’ve got a Kenwood Z838W head unit you may have noticed that the backlight will keep inverting which, no doubt, is driving you mad. Well not anymore. It’s a feature that Kenwood say is designed to save the life of the screen, fair enough, but if you want to stop it you can, it can be disabled by a specific reset sequence. The Sequence

  1. Turn unit to "ALL OFF" source mode
  2. Hold down the 1 and AM buttons
  3. Press the reset button
  4. Keep holding 1 and AM until the unit reset's
  5. Done.

the unit