Display inverter and ambient light sensor board
NOTE: If it has been determined that the display inverter or the ambient light sensor board are the
components that 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 or ambient light
sensor board . For information on replacing the display assembly, the display hinges, or the display
bezel, see
Display assembly on page 77.
Description Spare part number
Display inverter 450498-001
Ambient light sensor board 450480-001
Before removing the display inverter, 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 44).
Remove the display inverter:
1. Turn the computer right-side up, with the front toward you.
2. Open the computer as far as possible.
Component replacement procedures 45
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