Error Leds - IBM x3100 M5 Type 5457 Installation And Service Manual

Error LEDs

This section describes the Error LEDs on the system board and the suggested
actions to correct the detected problems.
The illustration shows the system-board LEDs. The system board has error LEDs
that will help to locate the source of the error. Run the diagnostic programs to find
out the cause of the error (see "IBM Dynamic System Analysis" on page 136).
IMM heartbeat LED
RTMM heartbeat LED
Power error LED
PCI slot 4 error LED
PCI slot 3 error LED
PCI slot 2 error LED
PCI slot 1 error LED
Battery error LED
Fan 2 connector
error LED
Figure 69. LED location on system board
The server is designed so that LEDs remain lit when the server is connected to an
ac power source but is not turned on, provided that the power supply is operating
correctly. This feature helps you to isolate the problem when the operating system
is shut down.
Note: When you disconnect the power source from the server, you lose the ability
to view the LEDs because the LEDs are not lit when the power source is removed.
Before you disconnect the power source, make a note of which LEDs are lit,
including the LEDs that are lit on the operation information panel and LEDs inside
the server on the system board.
Many errors are first indicated by a lit system-error LED on the control-panel
assembly of the server. If this LED is lit, one or more LEDs elsewhere in the server
might also be lit and can direct you to the source of the error.
Before you work inside the server to view the LEDs, read the "Safety" on page vii
and "Handling static-sensitive devices" on page 37.
If an error occurs, view the server LEDs in the following order:
1. Check the control-panel assembly on the front of the server. If the system-error
LED is lit, it indicates that an error has occurred.
2. Check the front and rear of the server to determine whether any component
LEDs are lit.
Microprocessor Fan 1 connector
error LED error LED
Standby power LED
System board
error LED
DIMM 4-1error LEDs
Chapter 4. Troubleshooting
127