Troubleshooting; Computer Stops Responding; Spills On The Keyboard - ThinkPad L480 User Manual

Lenovo Companion supports the hardware scan function. It combines diagnostic tests, system information
collection, security status, and support information, along with hints and tips for optimal system
performance. To run Lenovo Companion, see "Accessing Lenovo programs" on page 16.
The troubleshooting information or the diagnostic programs might tell you that you need additional or
updated device drivers or other software. You can get the latest technical information and download device
drivers and updates from the Lenovo Support Web site at:
http://www.lenovo.com/support
For additional information, see the help system of the program.

Troubleshooting

If your computer has an error, it typically displays a message or an error code, or makes a beep when you
turn it on. When you experience a problem, see the corresponding symptom and solution in this topic to try
to solve the problem by yourself.

Computer stops responding

Print these instructions now and keep them with your computer for reference later.
Problem: My computer is unresponsive (I cannot use the ThinkPad pointing device or the keyboard).
Solution: Do the following:
1. Press and hold the power button until the computer turns off. If you cannot turn off the computer by
pressing the power button, remove the ac power adapter. After the computer is turned off, reconnect the
ac power adapter, and then restart the computer by pressing the power button. If the computer does not
turn on, continue with step 2.
2. While the computer is turned off, remove all power sources from the computer. Plug in the ac power
adapter. If the computer does not turn back on, continue with step 3.
3. While the computer is off, remove all sources of power. Remove all external devices that are attached to
your computer (keyboard, mouse, printer, scanner, and so on). Repeat step 2. If step 2 is unsuccessful,
continue with step 4.
Note: The following steps involve removing static sensitive components from your computer. Make sure
that you are properly grounded and remove all sources of power attached to the computer. If you are
uncomfortable or unsure about removing components, call the Customer Support Center for assistance.
4. While the computer is off, remove all sources of power and external hardware. Remove any non-original
memory module added to your computer. After removing the extra memory module and reinstalling the
original memory module, repeat step 2. If the computer still does not turn on, consult the user manual for
other customer-replaceable components that are attached to your computer.
If the computer still does not start up, call the Customer Support Center and a Customer Support Specialist
will assist you.

Spills on the keyboard

Problem: I spill something on the computer.
Solution: Because most liquids conduct electricity, liquid spilled on the keyboard could create numerous
short circuits and damage your computer. To solve the problem, do the following:
1. Ensure that no liquid creates a short circuit between you and the ac power adapter (if in use).
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L480 and L580 User Guide