Troubleshooting Procedures
5-5
5.3.3 Fault Isolation Using Self Test
When the computer is first powered up, it automatically performs a self test of its central
hardware and memory functions. During self test (which lasts for a few seconds), the
display shows copyright and version number information.
Note:
Some procedures in this paragraph require you to use keystroke
sequences, such as
Ctrl-Alt-Del
. To execute a keystroke sequence such as this,
you must press all three keys simultaneously.
5.3.3.1 Self Test Error Messages
Upon successful completion of the self test, the computer automatically loads its
operating system and other built-in utilities. If the self test fails to complete successfully,
the display shows one of the error messages described in Table 5-2.
Note:
In the event of a hardware problem that affects the display, the Notebook
also communicates errors via a series of beeps. The interpretation of the beep
codes is provided in Table 5-3.
Very dark display and characters
are slightly visible when a light is
directed at surface of the display
High
Low
Low
Low
Low
Very dark display and no
characters are visible
Low
High
High
Medium
Low
Table 5-1 Display Troubleshooting Guide
Problem Description
Inverter
Board
LCD
Panel
Display
Cable
Mother
Board
BIOS
Summary of Contents for Extensa 600 Series
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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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