User Guide

MacBook Pro (17-inch, Early 2009) Symptom Charts — Communications 60
2010-06-11
No/Poor Wireless Signal
Unlikely cause: power adapter, battery, speakers, optical drive, hard drive, fan, camera,
microphone, top case
Quick Check
Symptom Quick Check
No/Poor Wireless Signal
• Unable to nd networks
• Intermittent connection
dropouts
• Slow transfer speeds
1. Check for nearby interference sources in the
2.4/5GHz range such as microwave ovens and
cordless phones (Knowledge Base HT1365).
2. Check that computer is within base station range
– move closer to base station.
3. Base station checks:
a. Base station is not set to low-power
transmission mode
b. Base station is not using unsupported
connection and encryption protocols
c. Check for possible Wi-Fi channel overlap
(nearby base stations using adjacent channel)
4. Isolate OS by booting from original install media
(10.5.x). Attempt to connect to base station.
Deep Dive
Check Result Action Code
1. Open System Proler, check to
see if AirPort card is recognized
under Network: AirPort Card.
Yes Use Software Update to make
sure all AirPort software and
rmware updates have been
applied. Ensure base station
is not using MAC address
ltering or creating a hidden
network.
No If card is not detected, go
to M11 - AirPort/Bluetooth -
Defective wireless devices.
2. Run Clamshell Service
Diagnostic utility and check
for all devices presence. If not
found, reseat the camera cable
connection to the logic board.
Yes Loose logic board connection N04
No Go to step 3.