1–8 Troubleshooting
Quick checklist
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.
■ Be sure that
❏ All device connections are secure.
❏ The device is receiving electrical power.
❏ The device is compatible with your operating system. For
compatibility information, refer to the Web site of the
device manufacturer.
❏ 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.
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