Lenovo ThinkPad 360 Hardware Maintenance Manual - Page 39
Power Systems Checkout, Checking the AC Adapter
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space key. A √ mark appears next to the selected icon. Insert the blank diskette when instructed. 2. Run the diskette drive test. 3. If the controller test detects an error, FRU code 10 appears. Replace the system board. 4. If the controller test runs without errors, the drive read/write tests start automatically. 5. If the drive test detects an error, FRU code 50 appears. If the diskette itself is known to be good, replace the drive. If no errors occur at the FDD position, the drive is not defective. Power Systems Checkout To verify the symptom of the problem, power-on the computer using each of the power sources available as follows. 1. Remove the battery pack. 2. Connect the AC Adapter and check that power is supplied. 3. Disconnect the AC Adapter and install the charged battery pack; then check that power is supplied by battery pack. If you suspect a power problem, see the appropriate power supply check listed below. "Checking the AC Adapter." "Checking the Battery Pack" on page 30. "Checking the Backup Battery" on page 31. "Checking the Standby Battery" on page 32. Checking the AC Adapter: You are here because the computer fails only when the AC Adapter is used. If the power-on indicator does not turn on, check the power cord of the AC Adapter for correct continuity and installation. 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. ThinkPad 340x (IBM 2610) 29