Technical information

Troubleshooting Symptom/Cure Tables: System Problems After Startup - 39
Network Problems
Refer to this troubleshooting table if you are unable to switch to the Ethernet network
option in the control panel or if you are unable to see any network devices.
Note: if you
are able to see most network devices, but one particular device does not show up in
the Chooser, troubleshoot the device in question. You most likely do not have a net-
work problem.
Possible Cause Possible Fix
Wrong option selected in
the Control Panel.
Open the Network control panel and select the Ethernet
option. Are you able to select the Ethernet option?
Yes: Verify that you can now see devices on the
network. If the problem persists, go to the next step.
No: Go to next step.
Corrupted PRAM. Reset parameter RAM. Hold down Command >Option> <P>
<R> during startup but before “Welcome to Macintosh”
appears.
Corrupted system soft-
ware.
Boot from the system CD that came with the unit. Open
the Network control panel and switch to Ethernet. Are
you able to switch to Ethernet and see Ethernet devices
on the network now?
Yes: Reinstall system software. (You must use the
system software CD that came with the unit to get the
correct version of Mac OS.) If the problem persists, go
to the next step.
No: Go to next step.
Bad Ethernet cable. Replace the Ethernet cable with a known-good cable.
Bad Ethernet port at the
wall or hub.
Try connecting to a different Ethernet port at the wall or
external hub. Are you able to switch to Ethernet and
see Ethernet devices on the network now?
Yes: The original Ethernet port is bad. Contact your
network administrator.
No: Go to next step.
The entire network is
down.
Are other users experiencing the same problem?
Yes: There is a network-wide problem. Contact your
network administrator.
No: Replace the logic board.