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4 - 2
4.2.
Power-On Self Test (Boot Check)
4.2.1.
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.)
4.2.2.
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.
Summary of Contents for ToughBook CF-72 Series
Page 11: ...3 3 3 2 System Memory Map ...
Page 35: ...5 10 5 2 Error Message IC3 IC3 IC3 IC3 IC31 IC3 IC3 IC10 17 IC10 17 IC10 17 IC1 IC2 ...
Page 36: ...5 11 IC3 IC31 IC31 IC5 IC5 IC5 ...
Page 37: ...5 12 IC5 IC5 IC30 IC5 IC5 IC5 ...
Page 38: ...5 13 IC5 IC28 IC33 IC49 IC3 ...
Page 39: ...5 14 ...
Page 40: ...5 15 ...