At startup, a dialog box comes up stating: “kernel panic” in Mac OS X or
1.If there are two RAM cards installed in the expansion slots, remove top card and restart.
•If symptom repeats, replace bottom card with
•If symptom does not repeat, replace top RAM card with
Error Beeps
The computer automatically performs a
Note: The PowerBook G4 has two memory expansion slots and accepts
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
•If symptom does not repeat, replace RAM card(s).
•If symptom repeats, replace logic board.
Computer beeps twice at startup
1.Two beeps means that EDO memory is installed in the RAM expansion slot. The PowerBook does not accept EDO memory.
2.Replace RAM card(s) with
•If symptom repeats, replace logic board.
Computer beeps three times at startup
1.Three beeps means that no RAM banks passed memory testing.
2.If a RAM card is installed in the upper expansion slot (if not, skip to next step), remove it and restart.
•If symptom does not repeat, replace RAM card.
•If symptom repeats, replace RAM in lower RAM slot with
Error Beeps Symptom Charts | PowerBook G4 (1GHz/867MHz) Troubleshooting - 5 |