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Check the LEDs on all the power supplies of the BladeCenter unit in which the
blade server is installed. If the LEDs indicate that the power supplies are working
correctly and reseating the blade server does not correct the problem, complete the
following steps:
1. Make sure that the control panel connector is correctly seated on the system
2. If no LEDs on the control panel are working, replace the bezel assembly; then,
3. Turn off the blade server.
4. Remove the blade server from the BladeCenter unit and remove the cover.
5. Make sure that the blade server is cabled correctly.
6. Remove or disconnect the following devices, one at a time, until you find the
7. Install and turn on the blade server. If the problem remains, suspect the
If the problem is solved when you remove an I/O-expansion card from the blade
server but the problem recurs when you reinstall the same adapter, suspect the
I/O-expansion card; if the problem recurs when you replace the adapter with a
different one, suspect the system board.
If you suspect a networking problem and the blade server passes all the system
tests, suspect a network cabling problem that is external to the system.
Calling IBM for service
See Appendix A, "Getting help and technical assistance," on page 83 for information
about calling IBM for service.
When you call for service, have as much of the following information available as
possible:
v Machine type and model
v Microprocessor and hard disk drive upgrades
v Failure symptoms
50
BladeCenter HS20 Type 7981: Problem Determination and Service Guide
board (see "System-board connectors" on page 7 for the location of the
connector).
try to turn on the blade server from the management-module (see the
BladeCenter documentation for more information).
failure. Reinstall, turn on, and reconfigure the blade server each time.
v I/O-expansion card.
v Drives.
v Memory modules. The minimum configuration requirement is 1 GB (two 512
MB DIMMs).
The following minimum configuration is required for the blade server to start:
v System board
v One microprocessor
v Two 512 MB DIMMs
v A functioning BladeCenter unit
following components in the following order:
a. DIMM
b. System board
c. Microprocessor
– Does the blade server fail the diagnostic programs? If so, what are the error
codes?
– What occurs? When? Where?
– Is the failure repeatable?
– Has the current server configuration ever worked?
– What changes, if any, were made before it failed?
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