Lenovo ThinkPad 770 Hardware Maintenance Manual for 770 series notebooks(Janua - Page 70

Modem (DSP)-Related Symptoms, PC Card-Related Symptoms, OS/2 and Windows

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SYMPTOM-TO-FRU INDEX Symptom / Error No beep, power-on indicator on, and a blank LCD during POST. LCD backlight not working. LCD too dark. LCD brightness cannot be adjusted. LCD contrast cannot be adjusted. LCD screen unreadable. Characters missing pels. Screen abnormal. Wrong color displayed. LCD has extra horizontal or vertical lines displayed. FRU / Action in Sequence 1. Reseat the CPU card 2. Reseat the video card. 3. System board 1. Reseat the LCD connectors. 2. LCD assembly 3. Video card 4. System board 1. See important note for "LCD-Related Symptoms." 2. Reseat all LCD connectors. 3. LCD assembly 4. Video card 5. System board 1. LCD assembly Modem (DSP)-Related Symptoms Symptom / Error FRU / Action in Sequence In OS/2, DOS, or Windows multimedia programs, no sound comes from the computer. (Only system beeps are heard at power-on.) Check that the device driver is installed correctly. In OS/2, DOS, or Windows, the modem does not work. Check that the DSP Modem is active. OS/2 and Windows: Click on the DSP Modem icon in the ThinkPad Configuration program. DOS: Run the MWMODEM ON command. PC Card-Related Symptoms Symptom / Error FRU / Action in Sequence The PC Card does not work in either the upper slot or the lower slot. Diagnostic error code: DEV 080 ERR 33 FRU 7210 1. Reseat the PCMCIA slot assembly. 2. PCMCIA slot assembly 3. System board The PCMCIA slot pin is damaged. 1. PCMCIA slot assembly 64

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SYMPTOM-TO-FRU INDEX
Symptom / Error
FRU / Action in Sequence
No beep, power-on indicator
on, and a blank LCD during
POST.
1.
Reseat the CPU card
2.
Reseat the video card.
3.
System board
±
LCD backlight not
working.
±
LCD too dark.
±
LCD brightness cannot
be adjusted.
±
LCD contrast cannot
be adjusted.
1.
Reseat the LCD
connectors.
2.
LCD assembly
3.
Video card
4.
System board
±
LCD screen
unreadable.
±
Characters missing
pels.
±
Screen abnormal.
±
Wrong color displayed.
1.
See important note
for “LCD-Related
Symptoms.”
2.
Reseat all LCD
connectors.
3.
LCD assembly
4.
Video card
5.
System board
LCD has extra horizontal or
vertical lines displayed.
1.
LCD assembly
Modem (DSP)-Related Symptoms
Symptom / Error
FRU / Action in Sequence
In OS/2, DOS, or Windows
multimedia programs, no
sound comes from the
computer. (Only system
beeps are heard at
power-on.)
Check that the device
driver is installed
correctly.
In OS/2, DOS, or Windows,
the modem does not work.
Check that the DSP
Modem is active.
OS/2 and Windows:
Click on the
DSP Modem
icon in the ThinkPad
Configuration program.
DOS:
Run the
MWMODEM ON
command.
PC Card-Related Symptoms
Symptom / Error
FRU / Action in Sequence
The PC Card does not work
in either the upper slot or
the lower slot.
Diagnostic error code:
DEV 080
ERR
33
FRU 7210
1.
Reseat the PCMCIA
slot assembly
.
2.
PCMCIA slot assembly
3.
System board
The PCMCIA slot pin is
damaged.
1.
PCMCIA slot
assembly
64