Lenovo ThinkPad 365E-ED ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 113

Checking the AC Adapter: You are here because the computer fails only when the AC Adapter is used. If the power problem occurs only when a Port Replicator is used, replace the replicator. If the power-on indicator does not turn on, check the power cord of the AC Adapter for correct continuity and installation. If the operational charge does not work, go to "Checking Operational Charging" on page 102. Note There are two types of adapters. The procedure for checking both types is the same. 1. 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: 2 1 (16 - 10 V) Pin Voltage (V dc) 1 +14.5 to +17.0 2 Ground If the voltage is correct, replace the system board. If the problem is not corrected, go to "Undetermined Problems" on page 116. If the voltage is not correct, go to the next step. 2. Unplug the AC Adapter cable from the ac power outlet and wait five minutes or longer to allow the over-voltage protection circuit to be fully discharged and initialized. 3. Plug the AC Adapter cable into the ac power outlet. 4. Measure the output voltage of the AC Adapter. 5. If the voltage is still not correct, replace the AC Adapter. Note An audible noise from the AC Adapter does not always indicate a defective adapter. ThinkPad 365X, 365XD (2625) 101