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2–30 Maintenance and Service Guide
Troubleshooting
Flowchart 2.20—No Network/Modem
Connection
Y
Disconnect all
power from
the computer
and open.
No network
or modem
connection.
N
Done
Digital
line?
Network
or modem jack
active?
Replace jack
or have jack
activated.
Connect
to nondigital
line.
NIC/modem
configured
in OS?
Reload
drivers and
reconfigure.
Reseat NIC/modem
(if applicable).
Replace
NIC/modem
(if applicable).
Replace
system
board.
Done
N
N
N
N
Y
Y
Y
Y
Network
or modem
connection
working?
Network
or modem
connection
working?