IBM Aptiva Series Hardware Maintenance page 78

003 - IF THE NUMBER OF HARD DISK DRIVES, OR CD-ROM IS
NOT CORRECT:
1. Check the installation of the drive ribbon cable to the system board.
Be sure that Hard Disk Drive 1 and Hard Disk Drive 2 in the Setup
Utility are connected to the primary hard disk drive connector CN11
on the system board. (see "System Board Layout" on page 5-2)
2. Check the hard disk drive jumper settings (see "Hard Disk Drive
Jumper Settings" on page 5-11).
3. Check the voltages to the disk drive power connectors with the
power on (see "Power Supply" on page 2-32).
4. Try to correct the drive setting in the Disk Drives of the BIOS Setup.
5. Run the "Device Presence by Diagnostics Program Test" on page
2-35. for hard disk drives and CD-ROM drive.
6. Restart the system and check the BIOS Setup.
7. In the BIOS Setup, check that the correct drive size is set for the
flagged drive shown in the Installed Devices list.
• If any drive is flagged as Not Installed, check the signal and
power cable for that drive.
• If the first drive is flagged as Not Installed, replace the
primary drive.
• If all drives are flagged as Not Installed, replace the primary drive.
• If any drive (other than the first drive) is flagged as Not
Installed, replace that drive.
If the problem remains, check the continuity on the drive cable
and replace the cable if necessary. If that does not fix the
problem, replace the system board.
8. If an upgrade processor is installed, make sure that the processor
speed shown is correct.
Note: The CD-ROM must be the last device installed and jumpers
set correctly to be listed in the BIOS Setup. See "Hard Disk
Drive Jumper Settings" on page 5-11 for factory-installed drive
device jumper settings and "CD-ROM Drive Jumper Settings"
on page 5-13. Also ensure the CD-ROM cable is installed in
connector CN2 on the system board.
For machine type 2136 models that come with an internal
CD-ROM drive. Ensure that its jumper is set as slave.
Check Procedures 2-25