Lenovo ThinkPad Edge E420s (English) User Guide - Page 160

AC power adapter problems, Power problems, A power button problem

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AC power adapter problems • Problem: The ac power adapter is connected to the computer and the working electrical outlet, but the power adapter (power plug) icon is not displayed in the task bar. Also the ac power indicator does not light up. Solution: Do as follows: 1. Make sure that the connection of the ac power adapter is correct. For connecting the ac power adapter, see the Setup Instructions manual included in the shipping contents of your computer. 2. If the above step is correct, turn off the computer, then disconnect the ac power adapter. 3. 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 "System-status indicators" on page 10. 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 firmly 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 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 memory (SO-DIMM). Refer to "Replacing memory" on page 82. d. Remove the PCI Express Mini Card. Refer to "Installing and replacing the PCI Express Mini Card for wireless LAN/WiMAX connection" on page 86. e. Remove the hard disk drive and mSATA solid state drive. Refer to "Replacing the solid state drive or hard disk drive" on page 76 and "Installing and replacing the mSATA solid state drive" on page 84. f. Wait for 30 seconds, and then reinstall the SO-DIMM and the ac power adapter to test the computer with minimal devices attached first. g. 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: Verify the battery-status indicator. Refer to "Power-status indicators" on page 11. The battery-status indicator is normally illuminated whenever 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. A power button problem • Problem: The system does not respond, and you cannot turn off the computer. 142 User Guide

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AC power adapter problems
•
Problem
: The ac power adapter is connected to the computer and the working electrical outlet, but the
power adapter (power plug) icon is not displayed in the task bar. Also the ac power indicator does
not light up.
Solution
: Do as follows:
1. Make sure that the connection of the ac power adapter is correct. For connecting the ac power
adapter, see the Setup Instructions manual included in the shipping contents of your computer.
2. If the above step is correct, turn off the computer, then disconnect the ac power adapter.
3. 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 “System-status indicators” on page 10. 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
firmly 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 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 memory (SO-DIMM). Refer to “Replacing memory” on page 82.
d. Remove the PCI Express Mini Card. Refer to “Installing and replacing the PCI Express Mini Card for
wireless LAN/WiMAX connection” on page 86.
e.
Remove the hard disk drive and mSATA solid state drive. Refer to “Replacing the solid state drive or
hard disk drive” on page 76 and “Installing and replacing the mSATA solid state drive” on page 84.
f.
Wait for 30 seconds, and then reinstall the SO-DIMM and the ac power adapter to test the computer
with minimal devices attached first.
g. 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:
Verify the battery-status indicator. Refer to “Power-status indicators” on page 11.
The battery-status indicator is normally illuminated whenever 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.
A power button problem
•
Problem
: The system does not respond, and you cannot turn off the computer.
142
User Guide