IBM X3950 X5 Problem Determination And Service Manual page 41

Microprocessor 1
error LED
"Microprocessor-board LEDs" on page 24 describes the function of each status
LED.
Table 7. Microprocessor board non-light-path-diagnostics status LEDs
LED
System management heartbeat LED
Microprocessor 1 - 4 error LEDs
Microprocessor-board error LED
Microprocessor 2
error LED
Memory card
connector 7
Description
When this LED is flashing at a constant rate of once every 2 seconds, it
indicates normal operation of the IMM.
Note: If this LED is not lit, do the following.
1. Reseat the system.
2. See "Confirm and recover IMM boot image failure" on page 75.
3. Replace the microprocessor-board assembly (trained service technician
only, see "Removing the microprocessor-board assembly" on page 171
and "Replacing the microprocessor-board assembly" on page 173.
4.
When one of these LEDs is lit, it indicates that an error has occurred in the
associated microprocessor.
Note: You must remove the top cover bracket before you can see these
LEDs.
When this LED is lit, it indicates that an error has occurred on the
microprocessor board.
Note: You must remove the memory card or memory card filler from
memory card connector 7 before you can see this LED.
Microprocessor 3 Microprocessor 4
error LED error LED
Microprocessor System management
board error LED heartbeat LED
25
Chapter 2. Introduction