Filter
Top Products
Symptom/Error FRU/Action in Sequence
Operating
system not
found
1. Enter BIOS Setup Utility and see if
the hard disk drive and diskette drive
A: are properly identified.
2. Diskette drive (FDD ASM)
3. Hard disk drive
4. Planar board
No Beep Symptoms
Symptom/Error FRU/Action in Sequence
No beep, power-on
indicator on, LCD
blank, no POST
Ensure every connector is
properly seated.
DIMM
Reseat CPU card.
CPU card
Planar board
No beep, power-on
indicator off, LCD
blank during POST
Battery ASM
AC Adapter
DC-DC & BATT board ASM
Planar board
No beep, power-on
indicator on, LCD
blank during POST
Reseat DIMM.
CPU card
Planar 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
LCD contrast cannot
be adjusted
1. Reseat the LCD connector.
2. Check the LCD inverter ID
3. LCD FPC ASM
4. LCD inverter
5. LCD
6. Planar board
LCD screen unread-
able
Character missing
pels
Screen abnormal
Wrong color dis-
played
1. Reseat the LCD connector.
2. Check the LCD inverter ID
3. LCD FPC ASM
4. LCD inverter
5. LCD
6. Planar board
LCD has extra hori-
zontal or vertical lines
displayed.
1. Check the LCD inverter ID
2. LCD FPC ASM
3. LCD inverter
4. LCD
5. Planar board
ThinkPad 390/i Series 1700 37