Filter
Top Products
2. If the above step is correct, turn off the computer, then disconnect the ac power adapter and uninstall
the main battery.
3. Reinstall the battery and reconnect the ac power adapter, then turn on the computer.
4. If the power adapter icon still does not appear on the task bar and the ac power indicator does not
light up, have the ac power adapter and your computer serviced.
Note: If your computer is a Windows 7 model, to display the power adapter (power plug) icon, click
Show hidden icons in the task bar.
Power problems
Print these instructions now and keep it with your computer for reference later.
If your computer is getting no power at all, check the following items:
1. Verify the power switch. Refer to “Status indicators” on page 18. The power switch is illuminated
whenever the computer is on.
2. Check all power connections. Remove any power strips and surge protectors to connect the ac power
adapter directly to the ac power outlet.
3. Inspect the ac power adapter. Check for any physical damage, and make sure that the power cable is
rmly attached to the adapter brick and the computer.
4. Verify the ac power source is working by attaching another device to the outlet.
5. Remove the computer from a ThinkPad X220 Ultrabase. Refer to “Detaching a ThinkPad X220
Ultrabase” on page 153.
6. Remove all devices and then test for system power with minimal devices attached.
a. Disconnect the ac power adapter and all cables from the computer.
b. Close the computer display, and turn the computer over.
c. Remove the battery. Refer to “Replacing the battery” on page 116.
d. Remove the memory (SO-DIMM). Refer to “Replacing memory” on page 143.
e. Remove the PCI Express Mini Card. Refer to “Installing and replacing the PCI Express Mini Card for
wireless LAN/WiMAX connection” on page 131.
f. Remove the hard disk drive and solid state drive. Refer to “Replacing the hard disk drive” on page
125 and “Replacing the solid state drive” on page 128.
g. Wait for 30 seconds, and then reinstall the SO-DIMM and the known good battery or the ac power
adapter to test the computer with minimal devices attached rst.
h. Reinstall each device one at a time that you have removed in the earlier steps.
If your computer does not run on battery power, check the following items:
1. Remove and reseat the battery to make sure that it is properly connected. Refer to “Replacing the
battery” on page 116.
2. Swap batteries with another similar model, if available.
If another similar ThinkPad model is available, then verify that the battery pack works in the other
computer and that the battery pack for the other model works in this computer.
3. Verify the battery-status indicator. Refer to “Status indicators” on page 18.
The battery-status indicator is normally illuminated whenever the battery is installed and the computer is
on, or the ac power adapter is connected and the battery is charging. This indicator may be blinking or
solid in either orange or green color depending on the status of the battery.
230 User Guide