58
Troubleshooting
Troubleshooting guidelines
As you troubleshoot your computer, keep the following guidelines in mind:
■
Never remove the chassis cover while the computer is turned on.
■
Do not attempt to open the monitor. Even if the power is disconnected,
stored energy in the monitor components can inflict a painful or harmful
shock.
■
If a peripheral does not work, make sure that all of the connections are
secure.
■
If you see an error message on the screen, write it down, word for word.
You may be asked about it when calling technical support.
■
Only qualified personnel should open the computer for maintenance.
■
If you are qualified to maintain the computer yourself, make sure you
are properly grounded before opening the computer chassis. See “Static
electricity precautions” on page 15 for more information on preventing
electrostatic damage to the computer.
Battery installation problems
If you have problems after installing the new battery, try each of the items
listed below:
■
Turn off the computer and make sure that all exterior cords and cables
are attached and secured to the correct connectors.
■
Make sure that all power switches are on. If the computer is plugged into
a power strip or surge protector, make sure it is turned on also.
■
Enter the BIOS Setup utility and compare the settings on the screen with
your notes. Correct any discrepancies.
■
Turn off the computer, remove the cover, and make sure that all cables
inside the case are attached securely. Also, make sure that the colored
cable edges are aligned correctly and that the connectors do not miss any
pins. Disconnect and reconnect the cables. Close the case as described
on page 18, then turn on the computer.
■
Turn off the computer, remove the cover and, if you have the proper test
equipment, make sure that the new battery has power. (Although
unlikely, your new battery may be defective.) Close the case as described
on page 18, then turn on the computer.
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