Apple MC408LL Apple Technician Guide - Page 41

Ethernet Port/Device Issue, Symptoms, Quick Check, Check, Result, Action

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Ethernet Port/Device Issue Unlikely cause: Adapter, hard drive, optical drive, fan Quick Check Symptoms Ethernet Port/Device Issue • No Ethernet device present • Unable to access network resources • Ethernet device shows no connection • Ethernet device unable to an IP address • Slow network performance Quick Check 1. Check the Ethernet cable for damage, try a known good Ethernet cable - CAT5 or better recommended for 100Mbps+ connections. 2. Check Ethernet ports on the Mac and wall/switch for dust, debris, damage or bent pins. 3. Ensure distance from networking infrastructure is less than 300 feet/ 105 meters 4. Verify port, cable and network hardware with a known good system. Isolate firewall, MAC address filtering or hardware access control devices 5. Isolate OS by starting up from original Install media for the computer, the same make and model computer in Target Disk Mode, or compatible known good OS on an external drive. Deep Dive Check Result Action 1. Visually inspect the Ethernet port on computer and verify that all pins will make physical contact with the CAT5 Ethernet cable. Yes Go to step 2 No Pins are damaged, bent flat or missing. Replace logic board 2. Boot from original Install media. Yes Go to step 3 Verify Network Link status active by using Network Utility under the "Info" tab. Is the Link Status "Active"? No If same Ethernet cable gives an "Active" link status on a known good computer of same make and model, replace logic board Code M24 M10 2010-08-03 Mac mini (Mid 2010) Symptom Charts - Communications 41

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Mac mini (Mid 2010) Symptom Charts — Communications
41
2010-08-03
Ethernet Port/Device Issue
Unlikely cause: Adapter, hard drive, optical drive, fan
Quick Check
Symptoms
Quick Check
Ethernet Port/Device Issue
•
No Ethernet device present
•
Unable to access network
resources
•
Ethernet device shows no
connection
•
Ethernet device unable to an IP
address
•
Slow network performance
1.
Check the Ethernet cable for damage, try a
known good Ethernet cable – CAT5 or better
recommended for 100Mbps+ connections.
2.
Check Ethernet ports on the Mac and wall/switch
for dust, debris, damage or bent pins.
3.
Ensure distance from networking infrastructure is
less than 300 feet/ 105 meters
4.
Verify port, cable and network hardware with a
known good system. Isolate firewall, MAC address
filtering or hardware access control devices
5.
Isolate OS by starting up from original Install
media for the computer, the same make and
model computer in Target Disk Mode, or
compatible known good OS on an external drive.
Deep Dive
Check
Result
Action
Code
1.
Visually inspect the Ethernet
port on computer and verify
that all pins will make physical
contact with the CAT5 Ethernet
cable.
Yes
Go to step 2
No
Pins are damaged, bent flat or
missing. Replace logic board
M24
2.
Boot from original Install media.
Verify Network Link status
active by using Network Utility
under the “Info” tab. Is the Link
Status “Active”?
Yes
Go to step 3
No
If same Ethernet cable gives
an “Active” link status on
a known good computer
of same make and model,
replace logic board
M10