Compaq 226824-001 - ProLiant - ML750 Setup And Installation Manual page 226

E-10 Compaq ProLiant ML750 Servers Setup and Installation Guide
IMPORTANT: To prevent damage to critical system components, the ProLiant ML750 server will not power up
if it senses that certain components are not installed, or are installed incorrectly. The system interconnect LED
indicator indicators provide a closed-loop checking mechanism for verifying proper component mating between
critical server components. These indicators are located in the I/O Module in front of the system fans. They are
operated using standby power provided by the power supplies. To check system interconnect LED indicators,
the server should be placed in standby mode with the power supplies plugged in.
Answer
No
Are all of the System Interconnect Status LED Indicators Off?
See "System Interlock LED Indicators" in Appendix D.
Possible Reasons
If a system interconnect LED indicator
corresponding to a component or module is on,
then the corresponding component or module is
missing or not seated properly.
This could include, any processor, Processor
Power Module (PPM), the memory board, a fan,
or the I/O module, processor and memory
module, or media module.
If the emergency shutdown system interconnect
LED is on, AC power to the system has been cut
to avert imminent component damage and data
loss.
The terminator PPM may have failed.
The fan controller has stopped responding.
The system has recorded a temperature
violation.
A short circuit may have occurred.
If the reset LED is on, the system is in reset.
A power supply may have stopped providing
adequate power as per system specifications
The system may have experienced a short
A PPM may have failed.
A reboot may have been initiated via Automatic
Server Recovery (ASR-2).
Table E-5
The Next Step
Reseat the component represented by
the system interconnect LED indicator.
Check for bent pins on the midplane and
power supply which may have caused a
short.
Verify that the fans are working properly.
Check the integrated management log
(IML) as soon as possible to view
messages which indicate the component
causing the shutdown.
Check for failed PPMs. When a PPM has
failed, a red LED can be viewed through
the grate on the processor and memory
module drawer.
Reseat the system boards.
Check for bent pins on the midplane.
Verify that the power supplies are
functioning properly.
continued