IBM ThinkPad 770E, Hardware Maintenance Manual

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SYMPTOM-TO-FRU INDEX
Function-Related Symptoms
Symptom / Error FRU / Action in Sequence
The system does not
suspend or resume when
the LCD is closed or
opened. 1. Go to “Suspend
Mode” on page 26,
and check that the
computer can enter
suspend mode.
2. Boot an operating
system and press
Fn
+
F4. If the
computer enters
suspend mode,
suspect that the
application program is
not working properly.
3. LCD assembly
4. System board
The battery Fuel-Gauge
does not go higher than
90%. Go to “Checking the
Battery Pack” on page 37
and see the note.
The memory count (size)
appears different from the
actual size. Go to “Memory Checkout”
on page 33.
The system configuration
does not match the installed
devices. Go to “Checking the
Installed Devices List” on
page 43.
The system hangs
intermittently. Go to “Intermittent
Problems” on page 66.
Indicator-Related Symptoms
Symptom / Error FRU / Action in Sequence
Indicator incorrectly remains
off or on, but system runs
correctly. 1. Reseat the LCD
connector on the
DC-DC card.
2. LCD cable assembly
3. DC-DC card
4. System board
The indicator incorrectly
remains off or on, but
system runs correctly. 1. Reseat the DC-DC
card.
2. DC-DC card
3. System board
The battery power status
indicator blinks from green,
yellow, to orange. 1. Check that a correct
battery is installed.
2. Reseat the inverter
cable.
3. Battery pack
4. DC-DC card
5. System board
The battery indicator does
not turn on when the battery
is installed. 1. Reseat the inverter
cable.
2. Battery pack
3. System board
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