Calling Ibm For Service - IBM LS20 - BladeCenter - 8850 Service Manual

If you suspect that a software problem is causing failures (continuous or
intermittent), see "Software problems" on page 39.
Damaged data in CMOS memory or damaged BIOS code can cause undetermined
problems. To reset the CMOS data, remove and replace the battery to override the
power-on password and clear the CMOS memory; see "Battery" on page 76. If you
suspect that the BIOS code is damaged, see "Recovering from a BIOS update
failure" on page 49.
Check the LEDs on all the power supplies of the BladeCenter unit where 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 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 adapter from the server but the
problem recurs when you reinstall the same adapter, suspect the adapter; 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 91 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
board (see "System-board connectors" on page 7 for the location of the
connector).
try to power-on the blade server from the BladeCenter Web interface (see the
BladeCenter documentation for more information).
failure. Reinstall, turn on, and reconfigure the blade server each time.
v I/O adapter.
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
51
Chapter 2. Diagnostics