Ethernet Port/Device Issue

Unlikely cause: LCD display, power supply, hard drive, optical drive, fans

Quick Check

Symptoms

Quick Check

 

 

 

Ethernet Port/Device Issue

1.

Check Ethernet cable for damage. Try a

• No Ethernet device present

 

known good Ethernet cable – CAT5 or better

• Unable to access network

 

recommended for 100Mbps+ connections.

 

 

resources

2.

Check Ethernet ports on the computer and wall/

• Ethernet device shows no

 

switch for dust, debris, damage or bent pins.

connection

3.

Ensure distance from networking infrastructure is

• Ethernet device unable to an IP

 

less than 300 feet/ 105 meters.

address

4.

Verify port, cable and network hardware with a

• Slow network performance

 

known good system. Isolate firewall, MAC address

 

 

filtering or hardware access control devices.

 

5.

Isolate OS by starting up from original Install

 

 

media for this computer, a same-model computer

 

 

in Target Disk Mode, or compatible known-good

 

 

OS on an external drive.

 

 

 

Deep Dive

Check

Result

Action

Code

 

 

 

 

 

1.

Visually inspect Ethernet port

Yes

Go to step 2.

 

 

of computer and ensure that all

 

 

 

 

No

Pins are damaged, bent flat or

M24

 

pins will make physical contact

 

 

missing. Replace logic board.

 

 

with the Ethernet cable.

 

 

 

 

 

 

 

 

 

 

 

2.

Boot from original Install media.

Yes

Go to step 3.

 

 

Verify Network Link status is

 

 

 

 

No

If same Ethernet cable gives

M10

 

active by using Network Utility

 

 

an “Active” link status on a

 

 

under the “Info” tab. Verify if the

 

 

 

 

known-good, same-model

 

 

Link Status is “Active”.

 

 

 

 

computer, replace logic board.

 

 

 

 

 

 

 

 

 

 

3.

Connect computer to another

Yes

Ethernet communication

 

 

Mac using CAT5 Ethernet

 

good. Go to step 4.

 

 

cable. See article http://

 

 

 

 

No

If same Ethernet cable and

M10

 

docs.info.apple.com/article.

 

 

computer connects to a

 

 

html?path=Mac/10.6/en/8429.

 

 

 

 

known-good, same-model

 

 

html. Verify if you connect

 

 

 

 

computer, replace logic board.

 

 

successfully.

 

 

 

 

 

 

 

 

 

 

 

2010-09-09

iMac (27-inch, Mid 2010) Symptom Charts — Communications  90

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Image 90
Apple MD094LL/A manual Symptoms Quick Check Ethernet Port/Device Issue