Checking the AC Adapter

Checking the AC Adapter

Check the AC adapter if the computer fails only when the AC adapter is used, or if the battery does not charge when the AC adapter is attached and the computer is on or in suspend mode.

If the power problem occurs only when the MultiPort II is used, replace the MultiPort II.
If the power-on indicator does not turn on, check the AC adapter for correct continuity and installation. If the connection is suspect, replace the AC adapter.
If the operational charge does not work, go to 'Power Related Symptoms'.

NOTE: Several types of AC adapters can be supplied with the ThinkPad 701C / 701CS. The procedure for checking them is the same.

Unplug the AC adapter cable from the computer and measure the output voltage at the plug of the AC adapter cable.

Pin Voltage (Vdc) 1 +15.5 to +17.0 2 Ground
If the voltage is not correct, replace the AC adapter.
NOTE: In rare cases, the problem may be in the AC adapter even when the voltage is correct. If an AC adapter is available, try replacing the computer's AC adapter.
If the voltage is correct, replace the top system board. If this does not correct the problem, go to 'Undetermined Problems'

Pin	Voltage (Vdc)
1	+15.5 to +17.0
2	Ground

NOTE: An audible noise from the AC adapter does not always indicate a defective adapter.

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