Checkout guide
v“Checking the backup battery” on page 32
Checking the ac adapter
You are here because the computer fails only when the ac adapter is used:
vIf the power problem occurs only when the port replicator is used, replace the port replicator.
vIf the
vIf the computer does not charge during operation, go to ″Checking operational charging.″
To check the ac adapter, do the following:
1.Unplug the ac adapter cable from the computer.
2.Measure the output voltage at the plug of the ac adapter cable. See the following figure:
Pin Voltage (V dc)
1
+15.5 to +17.0
2
Ground
3.If the voltage is not correct, replace the ac adapter.
4.If the voltage is acceptable, do the following: v Replace the system board.
vIf the problem persists, go to “Product overview” on page 35.
5.
Note: Noise from the ac adapter does not always indicate a defect.
Checking operational charging
To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.
Perform operational charging. If the battery status indicator or icon does not turn on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon still does not turn on, replace the battery pack.
If the charge indicator still does not turn on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section.