User Service Guide, Fifth Edition - HP Integrity rx8640 SEU

4 Troubleshooting
The following sections contain general procedures to help you locate installation problems.
Common Installation Problems
CAUTION: Do not operate the server with the top cover removed for extended period of time.
Otherwise, overheating can damage chips, boards, and mass storage devices. However, you can
safely remove the top cover while the server is running to remove and replace PCI hot-plug
cards.
Most problems are the result of incorrect system and SCSI subsystem configurations.
To troubleshoot an installation problem, perform the following checks in the order given:
1. Check all cable and power connections, including those in the rack, and so on.
2. Ensure the SEU is configured properly.
3. Verify all cables and boards are securely plugged into the appropriate connectors or slots.
4. Remove all extra options, such as disk drives, one at a time, checking its effect on the SEU.
5. Unplug the power cord, wait 20 seconds, plug the power cord in again, and restart the SEU.
6. If you suspect a hardware error:
a. Log users off the LAN and power down the SEU.
b. To remove PCI cards, extend the SEU out of the rack and remove the top cover.
c. Simplify the server to the minimum configuration.
The minimum configuration consists of the following:
• One core I/O card installed in the lower slot of the core I/O backplane
NOTE: The SEU will work without the top (secondary) core I/O card installed
but it will not operate without the bottom (primary) core I/O card installed.
• System backplane
• PCI-X backplane
• One BPS (A0)
• Two PCI power modules
• One power cord (A0)
7. Remove all third-party options, and reinstall each one, one at a time, checking the SEU after
each installation.
8. Replace the top cover and reconnect the power cord and other cables.
9. Boot up the SEU and if it does not function properly, refer to the following procedures.
The Server Does Not Power On
To check for power related problems:
1. Check each LED of the bulk power supply (BPS).
The LED is located on the BPS at the front of the SEU. Remove the front bezel to see the BPS
LED. Table 4-2 shows the states of the LEDs.
2. Check that the BPS and power cords are plugged into the chassis.
The SEU Powers On But Then Shuts Down with a Fault Light
To check for the following problems when the SEU powers on and then off:
Common Installation Problems 71