5-4
Troubleshooting Procedures
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.
Table 5-1 Display Troubleshooting Guide
Problem Description
Inverter
Board
LCD
Panel
Display
Cable
Mother
Board
BIOS
Single line on LCD display
(horizontal or vertical)
Low
High
Medium
Low
Low
Multiple lines on display
(horizontal or vertical)
Low
Medium
Medium
Low
Low
Sections of the display are
missing characters
Low
Medium
Medium
Low
Low
Scrambled Display
Low
Medium
Low
Medium
Medium
Intermittent characters on display
Low
Medium
Medium
Medium
Low
Bright display, no visible
characters
Low
Medium
Medium
Medium
Low
Brightness level fluctuating or
display blinking on/off
High
Low
Medium
Low
Low
Display goes dim over time
High
Medium
Low
Low
Low
Dim display but characters very
visible
Medium
Medium
Low
Low
Low
Summary of Contents for Extensa 600 Series
Page 46: ......
Page 55: ...Theory of Operation 4 9 Figure 4 3 M1521 Pin Assignments ...
Page 61: ...Theory of Operation 4 15 Figure 4 7 M6377 Chip Pinouts ...
Page 65: ...Theory of Operation 4 19 Figure 4 9 PCMCIA Controller Simplified Block Diagram ...
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Page 112: ...6 28 Field Service Figure 6 24 Removing Replacing the FIR Audio Board ...
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