Identifying Problems Using Status Leds; Front Panel And System Board Leds; Diagnostic Leds - IBM 8646 - Eserver xSeries 220 Hardware Maintenance Manual

10. Re-connect the power cord and all external cables and re-install the cover.
11. Restart the server

Identifying problems using status LEDs

The server has LEDs to help you identify problems with some server components.
These LEDs are part of the diagnostics that are built into the server. Use the
illuminated LEDs to identify the failing or incorrectly installed components.

Front panel and system board LEDs

The system error LED is on the front panel inside the server. All of the remaining
error LEDs are on the system board, adjacent to the failing components. See
"Diagnostic LEDs" for information on identifying problems using these LEDs.
The meanings of these LEDs are as follows:
CPU 1
CPU 2
Fan 1
Fan 2
Fan 3
Fan 4
DIMM 1
DIMM 2
DIMM 3
DIMM 4
VRM 1
VRM 2
Notes:
1. The fan and VRM LEDs will illuminate only if the IBM Remote Supervisor
2. The server does not support user-replaceable power supplies or fans.

Diagnostic LEDs

You can use the diagnostic LEDs built into the server to quickly identify the type
of system error that occurred. The server is designed so that LEDs remain
illuminated when the server shuts down, as long as the power supply is operating
properly. This feature helps you to isolate the problem if an error causes the server
to shut down. To correct specific problems, see "Symptom-to-FRU index" on
page 91.
5. Insert the BIOS flash diskette in the diskette drive.
6. Restart the server. The system begins the power-on self-test (POST).
7. Follow the on-screen instructions to update the BIOS.
8. Turn off the server and unplug the power cord when the flash update is
complete.
9. Move jumper J38 to the "hi" setting (pins 2 and 3) to return to normal startup
mode.
Microprocessor number 1 (connector U12) fault
Microprocessor number 2 (connector U11) fault
Fan number 1 (connector J10) failure (see note 1)
Fan number 2 (connector J18) failure (see note 1)
Fan number 3 (connector J3) failure (see note 1)
Fan number 4 (connector J2) failure (see note 1)
DIMM number 1 (connector DIMM 1) fault
DIMM number 2 (connector DIMM 2) fault
DIMM number 3 (connector DIMM 3) fault
DIMM number 4 (connector DIMM 4) fault
Microprocessor VRM number 1 (connector J42) fault (see note 1)
Microprocessor VRM number 2 (connector J12) fault (see note 1)
Adapter is installed in the server.
17
Diagnostics