Service manual

Chapter 5 Troubleshooting
67
2. During the Power on Self-Test (POST) early in the boot sequence, watch the two LEDs on each
hard disk drive module.
◊ Status LEDs: All LEDs quickly cycle from amber to steady green.
◊ Activity LEDs: All LEDs quickly cycle from amber to green. The LED stays steady green
until the drive spins up.
3. If no LEDs were illuminated on any disk drive modules, the power harness may not be correctly
connected. Check it as follows:
a. Turn off the HP NetServer power switch and unplug the AC power cords and any telephone
cables. Remove the fan assemblies.
b. Disconnect the P2 connector of the power harness, and then reconnect it.
c. Replace the fan assemblies. Reconnect the AC power cords and any telephone cables.
d. Restart the HP NetServer to determine whether the LEDs now become illuminated during
the POST. If not, contact your reseller.
4. If one or both LED indicators on a single module are not illuminated during the POST, the
module may be installed incorrectly, or its light pipes may be damaged.
Light Pipes
LED Light Pipes on Ultra2 Hard Disk Drive Module
(Shown for Low-Profile Disk Module)
Check the light pipe on the module as follows:
a. Remove the disk drive module.
b. Inspect the light pipes for damage. If a light pipe is damaged, contact your reseller.
CAUTION The light pipes are fragile. Be careful not to damage them when you inspect them or
when you reinsert the module.
c. Reinstall the disk drive module.
d. Restart the HP NetServer to determine whether the LEDs become illuminated during the
POST now. If not, contact your reseller.