HP Tc4400 Troubleshooting - Page 6

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. 1-4 Troubleshooting