Power Problems; A Power Button Problem - Lenovo ThinkPad E450 User Manual

Solution: Do the following:
1. Make sure that the connection of the ac power adapter is correct. For instructions on connecting the ac
power adapter, see Safety, Warranty, and Setup Guide that comes with your computer.
2. If the connection of the ac power adapter is correct, turn off the computer, then disconnect the ac power
adapter and remove 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 is not displayed in the Windows notification area and the system-status
indicator does not blink three times when an ac power source is connected, have the ac power adapter
and your computer serviced.
Note: If you are using the Windows 7 operating system, to display the power adapter (power plug) icon, click
Show hidden icons in the Windows notification area.

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 button. The power button is lit 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 bottom cover and disconnect the battery cable. Refer to "Replacing the storage
drive" on page 112.
d. Remove the memory module. Refer to "Replacing the memory module" on page 116.
e. Remove the hard disk drive, hybrid drive, or solid-state drive. Refer to "Replacing the storage
drive" on page 112.
f. Wait for 30 seconds, and then reinstall the memory module and the known good battery or 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, disconnect and reconnect the battery cable. Refer to
"Replacing the storage drive" on page 112

A power button problem

Problem: The system does not respond, and you cannot turn off the computer.
Solution: Turn off the computer by pressing and holding the power button for 4 seconds or more. If the
system is still not reset, remove the ac power adapter and the battery.
Boot problems
Print these instructions now and keep them with your computer for reference later.
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Chapter 8 Troubleshooting computer problems
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