Справочник Пользователя для Apple LATE 2009

Mac mini (Late 2009) Symptom Charts — Communications 

 2009-11-03

Unlikely cause: Adapter, hard drive, optical drive, fan

No Ethernet device present

• 

Unable to access network 

• 

resources
Ethernet device shows no 

• 

connection
Ethernet device unable to an IP 

• 

address
Slow network performance

• 

Check the ethernet cable for damage, try a 

known good Ethernet cable – CAT5 or better 

recommended for 100Mbps+ connections.
Check Ethernet ports on the Mac and wall/switch 

for dust, debris, damage or bent pins.
Ensure distance from networking infrastructure is 

less than 300 feet/ 105 meters
Verify port, cable and network hardware with a 

known good system. Isolate firewall, MAC address 

filtering or hardware access control devices
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.

Visually inspect the ethernet 

port of the computer to ensure 

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

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