Lenovo ThinkPad 380ED TP 380Z Hardware Maintenance Manual (August 1998) for us - Page 33

Peripheral-Device-Related Symptoms, Power-Related Symptoms, Reseat the LCD

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Symptom / Error No beep, power-on indicator on, and a blank LCD during POST. 1. LCD backlight not working. 2. LCD too dark. 3. LCD brightness cannot be adjusted. 4. LCD contrast cannot be adjusted. 1. The LCD screen is unreadable. 2. Some pels missing in characters. 3. The screen is abnormal. 4. Wrong color displayed. LCD has extra horizontal or vertical lines displayed. FRU / Action in Sequence 1. Reseat the CPU card. 2. DC/DC card 3. System board 1. Reseat the LCD connectors. 2. LCD inverter card 3. LCD assembly 4. System board 1. See important note for "LCD-Related Symptoms." 2. Reseat all LCD connectors. 3. LCD assembly 4. System board LCD assembly Peripheral-Device-Related Symptoms Symptom / Error FRU / Action in Sequence The external monitor does not work correctly. Connect the external monitor to another PC. If the monitor works fine, replace the system board. If not, replace the external monitor. Printer problems. 1. Run printer self-test. 2. Parallel port wrap test. 3. System board 4. Printer cable (See the printer manual for the above tests.) Serial or parallel port device problems. 1. Run serial or parallel port wrap test. (See the device manual for the test.) 2. Device 3. System board 4. Device cable Power-Related Symptoms ThinkPad 380Z 31

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Symptom / Error
FRU / Action in Sequence
No beep, power-on indicator
on, and a blank LCD during
POST.
1.
Reseat the CPU card.
2.
DC/DC card
3.
System board
1.
LCD backlight not
working.
2.
LCD too dark.
3.
LCD brightness cannot
be adjusted.
4.
LCD contrast cannot
be adjusted.
1.
Reseat the LCD
connectors.
2.
LCD inverter card
3.
LCD assembly
4.
System board
1.
The LCD screen is
unreadable.
2.
Some pels missing in
characters.
3.
The screen is
abnormal.
4.
Wrong color displayed.
1.
See important note
for “LCD-Related
Symptoms.”
2.
Reseat all LCD
connectors.
3.
LCD assembly
4.
System board
LCD has extra horizontal or
vertical lines displayed.
LCD assembly
Peripheral-Device-Related Symptoms
Symptom / Error
FRU / Action in Sequence
The external monitor does
not work correctly.
Connect the external
monitor to another PC.
If
the monitor works fine,
replace the system board.
If not, replace the external
monitor
.
Printer problems.
1.
Run printer self-test
.
2.
Parallel port wrap test.
3.
System board
4.
Printer cable
(See the printer manual for
the above tests.)
Serial or parallel port device
problems.
1.
Run serial or parallel
port wrap test
. (See
the device manual for
the test.)
2.
Device
3.
System board
4.
Device cable
Power-Related Symptoms
ThinkPad 380Z
31