Apple power mac g4 gigabit ethernet User Manual

							 Troubleshooting Symptom Charts/Network Problems -  6 3
Network Problems
Unable to see any 
network devices or 
connection drops off 
line by itself1 Try a known-good Ethernet cable.
2 Open the AppleTalk or TCP/IP system preference or control 
panel and select the Ethernet option. Verify that you can now 
see devices on the network.
3 Clear parameter RAM. Hold down Command-Option-P-R 
during startup until you hear a second startup chime.
4 Start up from the system installation CD or system restore 
CD that came with the computer. Open the AppleTalk or TCP/
IP system preference or control panel and select the Ethernet 
option. Are you able to switch to Ethernet and see Ethernet 
devices on the network? If so, troubleshoot software 
extensions or reinstall system software.
5 Try connecting to a known-good Ethernet port at the wall or 
external hub. 
6 Verify that other users are experiencing the same problem. If 
so, contact the network administrator. 
7 Replace the logic board. 
						

							 Troubleshooting Symptom Charts/Modem -  6 4
Modem
The internal modem is 
not recognized1 Make sure the correct CCL and extension files are installed.
2 Reseat the modem and modem cable.
3 Reinstall the CCL and modem extension. If the problem 
persists, reinstall the system software.
4 Clear parameter RAM. Hold down Command-Option-P-R 
during startup until you hear a second startup chime.
5 Replace the modem.
System reports a No 
Dial Tone error 
message1 Verify the modem phone cable is securely connected at the 
computer and the wall jack.
2 Verify the phone line is operational.
3 Replace the modem phone cable.
4 Reseat the modem and internal modem cables.
5 Replace the modem. 
						

							 Troubleshooting Symptom Charts/Modem -  6 5
There is a dial tone, 
but the modem cannot 
dial out1 International only: Use the Modem Country Selector utility to 
make sure the modem is set to the correct country.
2 Open the Modem system preference or control panel and 
verify that the correct modem type is selected, the sound is 
On, and the dialing is set to Tone. At this point, leave the 
Ignore Dial Tone setting unselected.
3 Make sure the correct driver is installed and the correct CCL 
is selected and that they are not corrupted. If necessary, 
reinstall the driver and/or CCL. 
4 Try another cable and phone jack.
5 Verify the modem settings with the internet service provider.
6 Open the Modem system preference or control panel and 
select Ignore Dial Tone. (Note: Some voice mail systems use a 
beeping dial tone to notify users of waiting messages, which 
can affect the modem connection.)
7 If the problem persists, reinstall the system and modem 
software. 
						

							 Troubleshooting Symptom Charts/Modem -  6 6
Computer freezes 
when modem dials1 Mac OS 9: Extensions are in conflict or the Mac OS is 
corrupted. Enable only the Mac OS files in Extensions 
Manager and any modem drivers needed. 
2 If the problem persists, reinstall the system software
Modem is having 
trouble connecting to 
online site1 International only: Use the Modem Country Selector utility to 
make sure the modem is set to the correct country.
2 The phone line may have too much noise. If the user has a 
second line, try that one. The user should contact the local 
phone company and request the line be checked.
3 Check to make sure the TCP/IP system preference or control 
panel is correctly configured for the users internet service 
provider. If it is not configured correctly, the modem may 
connect but wonÕt be able to access any sites.
4 Sometimes internet service providers use different servers 
for dial-up/authentication and for services. If one server is 
down, users may be able to log in but not access any services. 
Contact the internet service provider for help. 
						

							 Troubleshooting Symptom Charts/Modem -  6 7
Modem cannot connect 
to remote access 
server or to ISP1 Verify the phone number of the server. Dial the number 
using a telephone and listen for the ÒwhistleÓ of a modem. 
2 Make sure the user has set up remote access for the server 
being contacted.
3 The user may need to create pauses while the number is being 
dialed. Insert a comma between parts of the number where a 
pause might be needed. For example, the following entries 
cause remote access to dial Ò9Ó to get an outside line and then 
pause before dialing the rest of the number:
9, 555-1234
Modem is dropping its 
connection1 International only: Use the Modem Country Selector utility to 
make sure the modem is set to the correct country.
2 Try another cable and phone jack.
3 The phone line may be too noisy to handle the higher modem 
speeds. Try connecting at a slower speed or use a generic CCL 
file. (If you are familiar with the CCL script language, you 
can edit the modem script to force a connection at a lower 
speed.) If the problem continues, contact the phone company 
to report the bad phone line.
4 Check if the user has call waiting on that phone line. With 
call waiting active, an incoming call can interrupt the 
connection. Disable call waiting using AT commands placed in 
the init string of the dialup application. Usually the string is 
*70.
5 There may be a problem with the server the user is 
connecting to. Servers sometimes develop problems that 
disconnect users without explanation. Try calling back later 
or use an alternate number if one is available. If the problem 
persists, contact the internet service provider.
6 Reseat the modem and internal modem cables.
7 Replace the modem. 
						

							 Troubleshooting Symptom Charts/Modem -  6 8
Modem disconnects 
after a period of timeA timed disconnect setting is causing the modem to disconnect. 
Some internet service providers or software packages have a 
feature that will disconnect the user after a set period of time. 
Either increase this time setting or disable the feature if possible. 
Contact the internet service provider or network administrator 
for more information.
User does not receive 
a required callback 
from a server1 Contact the network administrator to verify the callback 
number is correct.
2 Verify the user has the correct modem script.
Modem is slow 
responding 1 Too many people are using the internet services. Users need 
to remember that the internet service provider has only a 
limited amount of bandwidth to the internet. If many people 
are dialing in, the individuals connect speed will be affected.
2 Check the phone line. The quality of the phone line can limit 
modem performance.  
						

							 
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© 2002 Apple Computer, Inc. All rights reserved. 
Upgrades
 
Power Mac G4 /
Macintosh Server G4 
						

							 
 Upgrades SDRAM DIMM -  1 
Installation 
Procedures 
SDRAM DIMM 
Before you begin, open the 
side access panel.
DIMM Slots 
						

							 
 Upgrades SDRAM DIMM -  2 
1. Align a DRAM DIMM in 
the DRAM slot so the 
notches line up with the 
ribs inside the slot.
2 . Push the DIMM down 
evenly until the ejectors 
snap into place. 
Note: 
 To remove a DIMM, 
push down on the slotÕs 
ejectors until they open and 
release the DIMM. Some 
DRAM slots may have only 
one ejector. 
Important: 
 After upgrading 
memory on a new, out-of-
the-box Power Mac G4 
DRAM DIMM 
Ejector

ConnectorsNotchesDRAM Slot
 (1 of 4)
Ribs (inside slot) 
						

							 
 Upgrades SDRAM DIMM -  3 
running Mac OS 9, you must 
press Option-S when 
restarting the computer. 
This ensures the customer 
will see the Setup Assistant 
(a movie and setup instruc-
tions). If these keys are not 
pressed down each time a 
technician restarts the sys-
tem after an upgrade, the 
Setup Assistant file will ex-
ecute, disable itself, and the 
customer will never see it.