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Display inverter or ambient light sensor
NOTE: If it has been determined that the display inverter must be replaced to complete the computer
repair, the display assembly does not have to be removed. Follow the procedures in this section to
replace the display inverter. For information on replacing the display assembly, the display hinges, or
the display bezel, see
Display assembly on page 70.
NOTE: The display inverter and the ambient light sensor are installed in the same location. The only
difference in removal and replacement is the ambient light sensor does not include a backlight cable
connector, while the inverter does. Models with LCD displays use the inverter, while models with
DreamColor LED displays use the ambient light sensor.
Description Spare part number
Display inverter for use only in models with an LCD display (includes Mylar shield) 494001-001
Ambient light sensor for use only in models with a DreamColor LED display – 494014-001 and
494015-001
495029-001
Before removing the display inverter or ambient light sensor, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 41).
Remove the display inverter or ambient light sensor:
1. Turn the computer right-side up, with the front toward you.
2. Open the computer as far as possible.
42 Chapter 4 Removal and replacement procedures