Lenovo ThinkPad 770 Hardware Maintenance Manual for 770 series notebooks(Janua - Page 68

Function-Related Symptoms, The battery Fuel-Gauge

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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 62

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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
62