Diagnostic Error Leds; System Board Error Leds - IBM 84885BU Maintenance And Troubleshooting Manual

Diagnostic error LEDs

Error LEDs are located on the system board and on the hard disk drives.

System board error LEDs

If the system-error LED on the front of the server is lit, there might also be lit LEDs
on the system board. The following illustration shows the locations of the error
LEDs on the system board.
Fan 4
error LED (D29)
If any of these LEDs is lit, it indicates a problem with the associated component.
After a problem is corrected, its LED will not be lit the next time the server is
restarted. If the LED remains lit after the server is restarted, the problem remains.
Complete the following steps to view the lit error LEDs:
1. Read Appendix B, "Safety information," on page 143 and "Handling
2. Remove the side cover (see "Removing the side cover" on page 28).
3. Remove the support bracket (see "Removing and installing the support bracket"
4. Open the microprocessor air baffle (see "Opening and closing the
5. If any error LEDs are lit, complete the following steps:
Fan 3
error LED (D25)
(reserved)
static-sensitive devices" on page 26.
on page 32).
microprocessor air baffle" on page 33).
a. Note which LEDs are lit.
b. Turn off the server and all attached devices.
c. Follow the instructions at "Diagnostic error LEDs" on page 109.
Fan 1
error LED (D26)
Microprocessor 2 Microprocessor 1
error LED (D22) error LED (D23)
DIMM 6
error LED (D16)
DIMM 5
error LED (D17)
DIMM 4
error LED (D18)
DIMM 3
error LED (D19)
DIMM 2
error LED (D20)
DIMM 1
error LED (D21)
Fan 2
error LED (D27)
17
Chapter 3. Diagnostics