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7 Power-On Self Test (Boot Check)
Outline of POST
The set has a boot check function called POST (Power-On Self Test) in it. The condition of the main body is diagnosed by checking
beep sound or error code.
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Start .............Test begins automatically when power switch is set to ON.
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Normal finish .....After memory checking, a beep sound is issued once and the set is placed into automatic stop.
Note: If no error occurs, nothing is displayed. (No display of OK, etc.)
Error Diagnosis by Checking Beep Signal Sound
The beep sound is as follows:
= long sound (about 0.4 sec.), = short sound (about 0.2 sec.), Length between sounds is about 0.1 sec.
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Table of errors classified by beep sounds
(1 (long sound) -2-3-4)
(Length of bar shows length of sound.)
Diagnosis
Beep signal sound
Error message
1(long sound)-2
BIOS ROM error
BIOS ROM error
RAM error
Keyboard controller error
RAM error
RAM error
RAM error
1-2-2-3
1-3-1-1
1-3-1-3
1-3-4-1
1-3-4-3
1-4-1-1
BIOS ROM error
2-1-2-3
Occurrence of unexpected offering
2-2-3-1
Main board
(Note) A beep sound is also issued in case of other I/O trouble.
12
Summary of Contents for CF-73ECLTXKM - Toughbook 73 - Pentium M 1.4...
Page 2: ...2 1 ...
Page 4: ...2 3 ...
Page 5: ...2 4 ...
Page 7: ...1 Specfication 4 ...
Page 8: ......
Page 11: ...3 Block Diagram System Confugration Diagram 8 ...
Page 12: ...4 9 ...
Page 14: ...6 11 ...
Page 56: ...1 2 3 4 5 6 7 8 9 10 11 A B C D E F G H I J CF 73E3 Printed Circuit Board Main PCB Top View ...
Page 57: ...1 2 3 4 5 6 7 8 9 10 11 A B C D E F G H I J Main PCB Bottom View ...
Page 58: ...1 2 3 4 5 6 7 8 9 10 11 A B C D E F G H I J VGA PCB Top View VGA PCB Bottom View ...
Page 59: ...Rear PCB Top View Rear PCB Bottom View 1 2 3 4 5 6 7 8 9 10 11 A B C D E F G H I J ...