Appendix A — Support
Troubleshooting Sequence
Server Boot Issues
System does not Boot after initial installation
Power Connector Not Plugged In
Processor Issues
Memory Issues
Monitor Issues
Power Supply and Chassis Issues
Cable Issues
Electrical Short or Overload
Defective Components
System does not boot after configuration changes
Hardware Changes
Software Changes
BIOS Changes
Viewing System Event Logs for investigation
Installation Problems
Troubleshooting External Connections
System does not Boot after initial installation
Power Connector Not Plugged In
If the power supply cable is not plugged into the Mainboard CPU power connector (see QSSC-S99K 2U Mainboard Compo-
nents on page 2 for the location), the system cannot boot up, even though chassis front panel LEDs and the fan
may be operational. Verify that the power connections are good.
Processor Issues
Boot failure situations are also caused by the following:
Incompatible processor—ensure the selected processor model is correct for your server board. Some processors
require specific server board versions and BIOS revisions. If the processor is compatible, try removing and reinstalling
the processor to ensure it is installed correctly.
Processor overheat—the system does not boot or shuts down shortly after booting.
Ensure that the cooling fans are correctly installed and running.
Ensure that the correct thermal interface material or the thermal grease is applied to the processor.
Ensure that the power supply fan is running.
Ensure that the air intakes for the external fans are unobstructed.
Memory Issues
If you have installed incompatible memory modules, the system may not boot. Verify the memory you've installed
has been tested with your board (see Supported DIMM Configuration on page 21 for details on valid memory
configurations). If the installed memory is compatible, try removing and reinstalling the memory modules.
Defective memory modules may cause boot errors. One, two or three beeps at boot indicate defective memory. To
isolate a specific memory module as defective, boot the system with just one memory module installed at a time.
Monitor Issues
Monitor configurations can cause boot failure. Run through the following checklist to verify monitor operation:
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Ensure the monitor is plugged in and turned on.
Ensure all cables are connected properly between the monitor and the computer.
Check the brightness and contrast controls on the monitor are not too low.
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