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Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No.
Result
YES
Brightness
adjustment
NO
Go to No.1-2
YES LCD
NO
Go to No.1-3
YES Main PCB
IC800
NO
LCD cable
YES
Brightness
adjustment
NO
Go to No.2-2
YES LCD
NO
Go to No.2-3
YES Main PCB
CN801
IC14
NO
LCD cable
YES LCD
NO
Go to No.3-2
YES Main PCB
IC800
NO
LCD cable
YES Inverter PCB
NO
Go to No. 4-2
YES Inverter cable
NO
Go to No. 4-3
YES Backlight
NO
Main PCB
CN801
IC14
Replace the Main PCB.
Does operation return to
normal?
3 Part of the screen does
not display properly.
Display quality poor.
(Fuzzy or slanted, etc.)
3-2
9
.3 LCD DIAGNOSIS
1 No picture appears on the
screen.
1-3
Replace the Main PCB.
Does operation return to
normal?
1-1
Replace the LCD.
Does operation return to
normal?
Source of
problem
Component
Troubleshooting
procedures
Symptom
No.
2-1
Does the LCD display
properly after brightness level
is adjusted?
1-2
Does the LCD display
properly after brightness level
is adjusted?
2 Display is too dark or too
bright.
Replace the LCD.
Does operation return to
normal?
2-2
2-3
Replace the Main PCB.
Does operation return to
normal?
3-1
Replace the LCD.
Does operation return to
normal?
4 Backlight does not turn
on.
Replace the Inverter PCB.
Does operation return to
normal?
Replace the Inverter cable.
Does operation return to
normal?
4-1
4-2
4-3
Replace the Backlight.
Does operation return to
normal?
17
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 ...