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Each error LED is lit to indicate a problem with a specific component. After a
problem is corrected, its LED will not be lit the next time the server is restarted; if
the problem remains, the LED will be lit again. See the User's Guide on the IBM
xSeries Documentation CD for additional information.
Recovering from a POST/BIOS update failure
If power to your server is interrupted while POST/BIOS code is being updated (flash
update), your server might not restart (reboot) correctly. If this happens, use the
following procedure to recover:
DIMM 3 error LED
DIMM 4 error LED
Microprocessor
fan error LED
System fan 2
error LED
System fan 1
error LED
Standby power
LED
1. Review the safety information beginning on page vii and "Handling
static-sensitive devices" on page 14
2. Turn off the computer and all attached devices.
3. Disconnect the power cord.
4. Remove the side cover and support bracket. (See "Removing the side cover"
on page 15 and "Removing and installing the support bracket" on page 17.)
5. Locate the boot block recovery jumper (JP1) on the system board, removing
any adapters that impede access to the jumper. The following illustration
shows the location of the jumper on the system board.
DIMM 2 error LED
DIMM 1 error LED
Chapter 6. Solving problems
67
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