Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 55

2010-06-15 Communications Ethernet Port/Device Issue Unlikely cause: power adapter, battery, speakers, optical drive, hard drive, fan, camera, microphone, top case, display assembly, AirPort card Quick Check Symptom 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 Quick Check 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 firewall, MAC address filtering or hardware access control devices. 5. Check system logs. Isolate OS by starting up from original install media (10.5.x) or compatible known good OS. Deep Dive Check Result 1. Visually inspect Ethernet Yes connector to ensure all pins will make physical contact with CAT5 network cable. No 2. Isolate OS by booting from Yes original install media. Verify Network Link status active by using Network Utility on install No DVD. If the Ethernet interface (en0) Link Status is inactive, recheck physical connect and link activity indicator on hub/ switch. Action Code Ethernet interface contacts are good. Go to step 2. Pins are damaged or bent flat, M10 replace logic board. Ethernet interface (en0) Link Status is active, go to step 3. If connection is OK on known- M10 good system, replace logic board. MacBook (13-inch, Aluminum, Late 2008) Symptom Charts - Communications 55