Checking the backup battery
Do the following:
1.Power off the computer, and unplug the ac adapter from it.
2.Turn the computer upside down.
3.Remove the battery pack (see “1010 Battery pack” on page 84).
4.Remove the backup battery (see “1100 Backup battery” on page 100).
5.Measure the voltage of the backup battery. See the following figure.
Red (+)
Black
Wire | Voltage (V dc) |
|
|
Red | +2.5 to +3.2 |
|
|
Black | Ground |
|
|
vIf the voltage is correct, replace the system board.
vIf the voltage is not correct, replace the backup battery.
vIf the backup battery discharges quickly after replacement, replace the system board.
