1–4 Troubleshooting
Quick checklist
■ Press the display switch on the computer to confirm that the
switch moves freely.
The display switch is normally located on the upper-left
corner of the keyboard.
■ If the computer has a magnetic display switch (select models
only), be sure that the computer is not near a strong magnetic
field and that no magnetized items (for example, a
magnetized screw driver) are laying on the computer.
■ If the computer has an ambient light sensor (select models
only), be sure that the sensor is not obstructed.
The ambient light sensor is normally located on the lower-left
corner of the display.
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