hp workstations zx6000, hp server rx2600 - operation and maintenance guide

Troubleshooting
Using the System’s LEDs and e-buzzer to Troubleshoot
Chapter 4
150
Locator LED and Button (Rack-mounted Systems only)
The locator LED provides a means for locating the system on which you intend to work.
For example, you find out that system number 5 in your rack of systems has a LAN cable
that needs to be replaced. This will require that you walk all the way around to the back
of your rack of systems to replace the cable. Once you get behind the rack of systems, you
need to locate the system that needs the cable replaced. The locator LED makes this an
easy task. When the locator button is pressed in, the locator LED begins to flash blue at
a frequency of one blink per second both on the front of the system and the back, thus
making it easy to locate the system on which you need to work.
The locator LED can also be activated or deactivated by use of the locator button on the
back panel of the system or by use of a Management Processor (MP) command. See
Chapter 3.
Diagnostic LEDs
There are four diagnostic LEDs located on the front bezel of your system. These LEDs
are labeled one through four. This section provides a table with a list of faults associated
with the various possible LED lighting sequences. These faults are placed in categories
that are appropriate to the system problem they indicate (for example, memory faults,
system board faults, etc.). Note that the red LEDs can be used to identify the fault
category of the LED error message. For example, if LED one is the only red LED, the
error message is for a memory fault. If LEDs one and two are red, the error message is
for a processor fault.
The column for the e-buzzer code in the following tables associates that code with a LED
error message; however, in some cases there is no e-buzzer code associate with a LED
error message. For more information on e-buzzer codes see the section “Troubleshooting
with the System’s e-buzzer” in this chapter (see page 158).
To use the LED Fault and Warning tables for troubleshooting a system problem, you
need to remember to use the correct table for a fault and a warning. You use the Fault
tables to diagnose a problem when the system light is blinking red, and you use the
Warning tables to diagnose a problem when the system light is blinking orange.
Memory FAULT (System LED is Blinking RED ●)
LED 1 LED 2 LED 3 LED 4 Fault and Solution
e-buzzer
code
Red
Any
a
Any
a
Any
a
Memory FAULT 3
Red Green Off Off Mismatched memorypairs; use the memory
sequence diagram on the system’s PCI/AGP
cage
3
Red Green Green Off No valid matching pairs/quads found;
install memory in matching pairs/quads
3
Red Green Green Green Bad memory: one or more DIMMs are bad,
or not seated properly; reseat the DIMM
card or replace it
3
a. This LED can display any color other than red (for example, green or off).