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• If the voltage is not correct, replace the power adapter.
• If the voltage is within the range, do the following:
– Replace the system board.
– If the problem is not corrected, see “Undetermined problems” on page
157.
– If the power-on indicator does not light up, check the power adapter’s
power cord for correct continuity and installation.
• If the operational charge does not work, see “Check the battery pack” on page
141.
Check the battery pack
To check the battery pack using software:
1 Open Power Management in the Windows Control Panel.
2 In Power Meter, make sure that the parameters shown for Current Power
Source and Total Battery Power Remaining are correct.
3 Repeat the steps 1 and 2, for both battery and adapter. This helps you identify
first the problem is on recharging or discharging.
To check the battery pack using hardware:
1 Turn off the notebook.
2 Remove the battery pack and measure the voltage between battery terminals
1 (+) and 6 (ground).
3 If the voltage is still less than 7.5 Vdc after recharging, replace the battery.
If the battery status indicator does not light up, remove the battery pack and let
it return to room temperature. Re-install the battery pack.
If the charge indicator still does not light up, replace the battery pack. If the charge
indicator still does not light up, replace the DC/DC charger board.
Important
An audible noise from the power adapter does not always
indicate a defect.
Important
To check the battery charge operation, use a discharged battery
pack or a battery pack that has less than 50% of the total power
remaining when installed in the notebook.