Power System Check
To verify the symptom of the problem, power on the computer using each of the following power sources:
1.Remove the battery pack.
2.Connect the power adapter and check that power is supplied.
3.Disconnect the power adapter and install the charged battery pack; then check that power is supplied by the battery pack.
If you suspect a power problem, see the appropriate power supply check in the following list: “Check the Battery Pack” on page 72
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