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CAUTION: To prevent overheating, do not obstruct vents. Use the
computer only on a hard, flat surface. Do not allow another hard surface,
such as a printer, or a soft surface, such as a pillow or a thick rug or
clothing, to block airflow.
An external device is not working.
If an external device does not function as expected:
• Turn on the device as instructed in the device user guide. Some
devices, such as monitors and printers, may not be powered by the
computer, and must be turned on before the computer is turned on.
• Verify that:
o All device connections are secure.
o The device is receiving electrical power.
o The device, especially if it is an older one, is compatible with
the operating system. For compatibility information, refer to
the Web site of the device manufacturer.
o The correct drivers are installed and updated. Drivers may
be available on a CD included with the device or on the Web
site of the device manufacturer.
The computer cannot connect to a wireless
local area network (WLAN).
If the computer cannot connect to a WLAN:
• Verify that the computer is within optimal range of a wireless router
(access point).
• Verify that the wireless light on the computer is turned on.
• Verify that the computer wireless antennae are free from
obstructions.
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