Lenovo ThinkPad S31 ThinkPad S30, S31 Hardware Maintenance Manual (October 200 - Page 26

No Beep Symptoms, LCD-Related Symptoms

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Symptom/Error Operating system not found FRU/Action in Sequence 1. Check that the operating system has no failure and is installed correctly. 2. Enter IBM BIOS Setup Utility and see whether the hard disk drive and the diskette drive are properly installed. 3. Diskette drive 4. Hard disk drive 5. System board No Beep Symptoms Symptom/Error FRU/Action in Sequence No beep, power-on indicator on, LCD blank, no POST 1. Ensure every connector is connected tightly and correctly. 2. DIMM 3. System board No beep, power-on indicator off, LCD blank during POST 1. Battery ASM 2. AC Adapter 3. System board No beep, power-on indicator on, LCD blank during POST 1. Reseat DIMM. 2. System board No beep during POST Speaker but system runs correctly. LCD-Related Symptoms Symptom/Error FRU/Action in Sequence LCD backlight not working LCD too dark 1. Reseat the LCD connector. 2. LCD FPC ASM 3. LCD inverter LCD brightness cannot be adjusted 4. LCD 5. System board LCD screen unreadable 1. Reseat the LCD connector. Character missing pels Screen abnormal 2. LCD FPC ASM 3. LCD inverter 4. LCD Wrong color displayed 5. System board LCD has extra horizontal or vertical lines displayed. 1. LCD FPC ASM 2. LCD inverter 3. LCD 4. System board 22 ThinkPad s30, s31

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Symptom/Error
FRU/Action in Sequence
Operating system
not found
1.
Check that the operating system has no
failure and is installed correctly.
2.
Enter IBM BIOS Setup Utility and see
whether the hard disk drive and the
diskette drive are properly installed.
3.
Diskette drive
4.
Hard disk drive
5.
System board
No Beep Symptoms
Symptom/Error
FRU/Action in Sequence
No beep, power-on
indicator on, LCD blank,
no POST
1.
Ensure every connector is
connected tightly and correctly.
2.
DIMM
3.
System board
No beep, power-on
indicator off, LCD blank
during POST
1.
Battery ASM
2.
AC Adapter
3.
System board
No beep, power-on
indicator on, LCD blank
during POST
1.
Reseat DIMM.
2.
System board
No beep during POST
but system runs correctly.
Speaker
LCD-Related Symptoms
Symptom/Error
FRU/Action in Sequence
LCD backlight not
working
LCD too dark
LCD brightness cannot
be adjusted
1.
Reseat the LCD connector.
2.
LCD FPC ASM
3.
LCD inverter
4.
LCD
5.
System board
LCD screen unreadable
Character missing pels
Screen abnormal
Wrong color displayed
1.
Reseat the LCD connector.
2.
LCD FPC ASM
3.
LCD inverter
4.
LCD
5.
System board
LCD has extra horizontal
or vertical lines
displayed.
1.
LCD FPC ASM
2.
LCD inverter
3.
LCD
4.
System board
22
ThinkPad s30, s31