Apple g4 Manual Do Utilizador

PowerBook G4 (1GHz/867MHz) Troubleshooting - 6

AirPort Card Symptom Charts

3. If a RAM card is not installed in the upper expansion slot, replace RAM in lower RAM 

slot with known-good and compatible RAM card and restart.

• If symptom repeats, replace logic board.

1. Four beeps indicates a bad checksum for the remainder of the boot ROM. The ROM 

(which is located on the logic board) is bad.

2. Replace RAM card(s) with known-good and compatible RAM and restart.

• If symptom repeats, replace logic board.

Related articles:
58442: Power On Self-Test Beep Definition - Part 2
95132: PowerBook G4: Installing or Replacing Memory

1. In Mac OS X, use Software Update in System Preferences, or in Mac OS 9 use the 

Software Update control panel, or see the Apple Software Updates web page to make 
sure the latest version of AirPort software is installed.

2. Restart the computer. Mac OS 9: Restart using Mac OS All extensions setting. 

3. Mac OS X: Open AirPort in System Preferences and make sure AirPort is on and 

Base Station is selected. Mac OS 9: Open Airport in Apple Menu and make sure 
AirPort is on and Base Station is selected. 

4. Reseat AirPort Card and make sure AirPort antenna cable is fully connected. 

5. Remove and reinstall the AirPort software.

6. Replace with known-good AirPort Card. 

7. Replace logic board.

1. Flip over the unit and release the battery latch by sliding the latch towards the PC 

Card button.

2. If the battery still will not eject, while holding the latch towards the PC Card button, use 

a small plastic flat-blade tool to pry the battery around the battery latch.

3. Verify proper latch operation, by exercising the latch. If it does not move smoothly or 

evenly, replace the latch. 

4. If the latch does exercise correctly, verify that the customer is not installing the battery 

with excessive force.