Apple M9628LL Service Guide - Page 149

Computer beeps three times at startup, Hard drive will not initialize

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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 expansion slot, remove it and put in known-good and compatible RAM and restart. • If symptom does NOT repeat, replace RAM card. • If symptom repeats, replace logic board. 3. If no RAM card is installed, replace logic board. Computer beeps four times at startup 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. If a RAM card is installed in the expansion slot, remove it and put in known-good and compatible RAM and restart. • If symptom does NOT repeat, replace RAM card. • If symptom repeats, replace logic board. 3. If no RAM card is installed, replace logic board. Related articles: 58442: Power On Self-Test Beep Definition - Part 2 111772: iBook (Dual USB): Beeps Are Heard at Startup (one to four beeps) Hard Drive Hard drive will not initialize 1. Boot from iBook Software Install CD and see if the hard drive mounts on the desktop. 2. Boot from the Mac OS X software install CD. Under the File menu, select Disk Utilities and initialize the disk or run Disk First Aid. 3. If no hard drive is found in Drive Setup, verify the hard drive cable connections. 4. Replace hard drive cable.(This is the same cable that attaches to the optical drive.) 5. Replace hard drive. Important: If the computer is under warranty and data recovery is required, refer to Article 31077: Hard Drive Data Recovery & Warranty Implications, for important information. Symptom Charts iBook G4 (14.1 LCD) Troubleshooting - 3

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iBook G4 (14.1 LCD) Troubleshooting -
3
Symptom Charts
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 expansion slot, remove it and put in known-good and
compatible RAM and restart.
•
If symptom does NOT repeat, replace RAM card.
•
If symptom repeats, replace logic board.
3.
If no RAM card is installed, replace logic board.
Computer beeps four times at startup
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.
If a RAM card is installed in the expansion slot, remove it and put in known-good and
compatible RAM and restart.
•
If symptom does NOT repeat, replace RAM card.
•
If symptom repeats, replace logic board.
3.
If no RAM card is installed, replace logic board.
Related articles:
58442: Power On Self-Test Beep Definition - Part 2
111772: iBook (Dual USB): Beeps Are Heard at Startup (one to four beeps)
Hard Drive
Hard drive will not initialize
1.
Boot from iBook Software Install CD and see if the hard drive mounts on the desktop.
2.
Boot from the Mac OS X software install CD. Under the File menu, select Disk Utilities
and initialize the disk or run Disk First Aid.
3.
If no hard drive is found in Drive Setup, verify the hard drive cable connections.
4.
Replace hard drive cable.(This is the same cable that attaches to the optical drive.)
5.
Replace hard drive.
Important:
If the computer is under warranty and data recovery is required, refer to
Article 31077: Hard Drive Data Recovery & Warranty Implications, for important
information.