Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 26

2010-06-15 Clamshell Service Diagnostic Read Me Isolating video and wireless issues in portable computers can be time consuming and confusing. The Clamshell Service Diagnostic (CSD) is a new diagnostic tool that checks Apple's latest portable computers for the presence of AirPort, Bluetooth, LCD and Ambient Light Sensor (ALS) to assist you in quickly making a failure determination. Troubleshooting benefits of using CSD include: • Quick way (less than 1 minute) to determine whether clamshell-related modules (AirPort, Bluetooth, LCD and ALS) are electrically connected without taking apart the system. • Results of CSD can help pinpoint if any clamshell cables may need to be reseated to logic board. • Diagnostic results can help isolate a video or wireless issue to either the clamshell or the logic board, to avoid unnecessary replacements of these components. CSD checks for the presence of the computer's: • AirPort • Bluetooth • LCD • ALS CSD does not check for the presence of the computer's: • iSight camera • externally connected hardware components (such as USB or FireWire devices) CSD does not check for issues with the OS X or other software-related problems such as application or extension conflicts. Display Issue: Pixel Anomalies When displaying a single color over the screen area, the LCD panel might show one or more pixels that are not properly lit. To determine if the display has an acceptable number of pixel anomalies, follow the steps below: 1. Set the display image to one of the following colors: all-white, all-red, all-green, all-blue, or all-black display. Knowledge Base article 112125: Service Diagnostics Matrix has the LCD Tester Diagnostic Utility that will generate these patterns on the screen. 2. Using a jeweler's loupe, pocket microscope, or other magnifying device, identify and count each pixel anomaly: Bright subpixel anomaly = subpixel that is always on Dark subpixel anomaly = subpixel that is always off 3. The number of acceptable pixel anomalies for this computer is: Bright Dark Combination Up to 3 Up to 5 Up to 7 MacBook(13-inch,Aluminum,Late2008)GeneralTroubleshooting-ClamshellServiceDiagnosticReadMe 26