Power | System | Checkout |
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To verify the symptom of | the problem power on the com- | ||
puter | using | each of the | following power sources: |
1.Remove the battery ASM.
2.Connect the AC Adapter and check that power is sup- plied.
3.Disconnect the AC Adapter and install the charged battery ASM; then check that power is supplied by the battery ASM.
If you suspect a power problem, refer to the appropriate power supply check listed below:
Ÿ “Checking the AC Adapter”
Ÿ “Checking the Operational Charging” on page 34
Ÿ“Checking the Battery ASM” on page 34
Checking the AC Adapter: | You are here |
| |
because the computer fails only when the | AC Adapter is | ||
used: |
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Ÿ If the power problem | occurs | only when | the ThinkPad |
Port Replicator with Advanced | Etherjet | Feature. | |
ŸIf the
power cord of the AC Adapter for correct continuity and installation.
ŸIf the operational charge does not work, go to “Checking the Operational Charging” on page 34.
Unplug the AC Adapter cable from the computer and
measure the output voltage at the plug of the AC Adapter cable. See the following figure.
Pin |
| Voltage | (V | dc) |
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1 |
| +15.5 | to | +17.0 |
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2 |
| Ground |
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If | the voltage is not correct, replace the AC Adapter. | ||||
If the voltage is within the range, do the following:
Ÿ Replace the
Ÿ Replace the system board.
ŸIf the problem is not corrected, go to “Undetermined Problems” on page 47
Note: An audible noise from the AC Adapter does not always indicate a defective adapter.
