Texas Instruments Extensa 60x Series Maintenance Manual page 74

light, check the following controls on the display):
LCD suspend mode - press Shift to terminate Suspend mode.
Brightness set too low - press Fn-Up Arrow keys to increase screen
brightness
Notebook Set for External Monitor - press Fn-F12 to switch to the internal
screen.
Faulty LCD - Replace the cover-display assembly as described in Section 6
of this manual.
Low battery - Use a fully charged battery and/or plug in the AC adapter.
Table 5-1 contains fault isolation information for Display Problems on the notebook.
Symptoms are listed along the left side of the chart and the various Display FRUs are
listed along the top of the chart. Within the body of the table are the probabilities of
each of the FRUs causing that particular problem. For example, a single display line
on the screen is most likely caused by the LCD Panel or Display Cable; other components
have a low probability of causing the problem.
Problem Description
Single line on LCD display
(horizontal or vertical)
Multiple lines on display
(horizontal or vertical)
Sections of the display are
missing characters
Scrambled Display
Intermittent characters on display
Bright display, no visible
characters
Brightness level fluctuating or
display blinking on/off
Display goes dim over time
Dim display but characters very
visible
5-4 Troubleshooting Procedures
Table 5-1 Display Troubleshooting Guide
Inverter LCD
Board Panel
Low High
Low Medium
Low Medium
Low Medium
Low Medium
Low Medium
High Low
High Medium
Medium Medium
Display Mother
Cable Board
Medium Low
Medium Low
Medium Low
Low Medium
Medium Medium
Medium Medium
Medium Low
Low Low
Low Low
BIOS
Low
Low
Low
Medium
Low
Low
Low
Low
Low