Apple MacBook Pro 13 inch - Communications; Ethernet Port;Device Issue

MacBook Pro (13-inch) Symptom Charts — Communications 82
2010-09-14
Communications
Ethernet Port/Device Issue
Unlikely cause: power adapter, battery, speakers, optical drive, hard drive, fan, camera,
microphone, top case, display clamshell, AirPort card
Quick Check
Symptom Quick Check
Ethernet Port/Device Issue
• No Ethernet device present
• Unable to access network
resources
• Ethernet device shows no
connection
• Ethernet device unable to get
an IP address
• Slow network performance
1. Check the network cable for damage, try a
known good Ethernet cable – CAT5 or better
recommended for 100Mbps+ connections.
2. Check Ethernet ports on 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 rewall, MAC address
ltering or hardware access control devices.
5. Check system logs. Isolate OS by starting up from
original OS install disc (10.6.x) or compatible
known good OS.
Deep Dive
Check Result Action Code
1. Visually inspect Ethernet
connector to ensure all pins
will make physical contact with
CAT5 network cable.
Yes Ethernet interface contacts
are good. Go to step 2.
No Pins are damaged or bent at,
replace logic board.
M10
2. Isolate OS by booting from
original OS install disc. Verify
Network Link status active by
using Network Utility on install
DVD. If Ethernet interface
(en0) Link Status is inactive,
recheck physical connect and
link activity indicator on hub/
switch.
Yes Ethernet interface (en0) Link
Status is active, go to step 3.
No If connection is OK on known-
good system, replace logic
board.
M10