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PowerBook G4 (15-inch FW 800_1.5/1.33GHz) Troubleshooting - 17
Hardware Symptom Charts
Application Quits, Kernel panic or other booting problems
1. If a specific application quits, replace the application. Verify the application is
compatible with OS X.
2. Clear parameter RAM. Hold down Command-Option-P-R during startup until you hear
a second startup chime.
3. Run Disk Utility from the Software Install and Restore DVD.
4. Perform a clean install of system software with the software install and restore disc
that came with the computer.
Note: Restore disc images are available at http://service.info.apple.com. Select “Disc
Images.”
5. Reboot system.
6. Run Apple Service Diagnostic in loop mode (Control-L) for an extended time to test
the memory. If the test finds bad memory, replace the DIMMs one at a time and test
until all bad DIMMs are replaced with known-good modules.
7. Replace the logic board.
Error Beeps
The computer automatically performs a power-on self test when it is turned on after being
fully shut down (not a restart). This section describes what to do if beeps are heard during
the startup.
Note: The PowerBook G4 (15-inch FW 800) uses PC2700 (also called DDR333) DDR
SDRAM SO-DIMMs with a maximum height of 1.25-inch (30 mm). Refer to Memory Card
Take Apart chapter for removal and installation.
Computer beeps once at startup
1. One beep means that no RAM is detected.
Note: There is no RAM on the logic board itself, so the computer will beep if no
memory is installed in at least one of the RAM slots.
2. Put the original RAM that came with the computer back in, or put in known-good and
compatible RAM and restart.
• If symptom does not repeat, replace RAM card(s).
• If symptom repeats, replace logic board.