Lenovo ThinkPad 380ED ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADo - Page 440

If the voltage is more than +4.0 V dc, power-off the computer, replace the standby battery, and go to the next step. 9. Ensure that the AC Adapter is plugged into the computer; then power on the computer. 10. Charging of the standby battery starts immediately. A depleted battery needs approximately 30 minutes to be recharged to the operational voltage of +3.5 V dc. 11. Unplug the AC Adapter. 12. Verify the standby battery function by removing and installing the battery pack during suspend mode. Note: Removing and installing the battery pack during suspend mode should be done within one minute. If the system does not resume after a charged battery pack is installed, replace the DC/DC card. If replacing the DC/DC card does not resolve the problem, replace the system board. Common Device Checkout If a common device problem is suspected, see the appropriate power supply check in the following list: "Port Replicator Checkout" "External Display Self-Test" Port Replicator Checkout: Use the following procedure to isolate a port replicator problem. 1. Power off the computer. 2. Remove the failing devices from the replicator. 3. Unplug the AC adapter from the replicator, if attached. 4. Remove the port replicator from the computer. 5. Reconnect the failing device directly to the computer. (If another device is already connected to the computer, remove it first.) 6. Go to the "Running the Diagnostics" on page 449 and run the diagnostics. 7. If the advanced diagnostic device test does not find an error, suspect a problem with the port replicator of the system expansion bus. 8. Power off the computer and reconnect the port replicator. 9. Power on the computer and run the following advanced diagnostic tests: Serial port test with the wrap plug installed on the replicator Parallel port test with the wrap plug installed on the replicator FDD-2 device test on the failing device with a scratch diskette 10. If diagnostic errors appear, replace the replicator or diskette drive attachment unit. 428 IBM Mobile Systems HMM