Apple G4 manual Display latch not working

Display

Display latch not working

Note: When the display is being closed, a latch hook in the top of the display housing should be magnetically pulled down through the slot in the top case and secured by the latch mechanism. When the latch button is pushed, the hook should release and retract into the display housing.

1.See the Latch Adjustment chapter in the Adjustments section of this service manual to verify the latch mechanism and latch hook operation and make adjustments, if necessary.

2.If the latch hook is broken, replace the display panel assembly.

When displaying a single color over the screen area, the LCD panel shows one or more pixels that are not properly lit

To determine whether or not 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 display, all-red display,

all-green display, or all-blue 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 system is:

Acceptable Number of Subpixel Anomalies

Bright

Dark

Combination

Up to 3

Up to 5

Up to 7

4.If the number of subpixel anomalies exceeds the acceptable number listed in the above chart, replace the display panel assembly.

Replace

Bright

Dark

Combination

4 or more

6 or more

8 or more

Battery Symptom Charts PowerBook G4 (1GHz/867MHz) Troubleshooting - 8