Solving Undetermined Problems - IBM X3950 X5 Problem Determination And Service Manual

v Check the LAN activity LED on the rear of the server. The LAN activity LED is
v Check for operating-system-specific causes of the problem.
v Make sure that the device drivers on the client and server are using the same
If the Ethernet controller still cannot connect to the network but the hardware
appears to be working, the network administrator must investigate other possible
causes of the error.

Solving undetermined problems

This topic provides instructions for how to solve undetermined problems if the
diagnostics tests do not diagnose the failure.
If the diagnostic tests did not diagnose the failure or if the server is inoperative,
use the information in this section.
If you suspect that a software problem is causing failures (continuous or
intermittent), see "Software problems" on page 56.
Damaged data in CMOS memory or damaged IBM UEFI firmware can cause
undetermined problems. To reset the CMOS data, turn off the server and remove
the battery for two minutes.
Damaged memory-card connector pins or incorrectly installed memory cards can
prevent the server from starting or might cause a POST checkpoint halt. For
example, a memory card that is not completely installed or has bent connector pins
might cause the server to continually restart or display an F2 checkpoint halt.
Remove and inspect all memory-card connector pins for bent or damaged interface
pins (see "Removing a memory card" on page 136 and "Replacing a memory card"
on page 137). Replace all memory cards that have damaged pins and make sure
that each card is completely latched into place.
Check the LEDs on all the power supplies (see "Power-supply LEDs" on page 69).
If the LEDs indicate that the power supplies are working correctly, complete the
following steps:
1. Turn off the server.
2. Make sure that the server is cabled correctly.
3. Remove or disconnect the following devices, one at a time, until you find the
lit when data is active on the Ethernet network. If the LAN activity LED is off,
make sure that the hub and network are operating and that the correct device
drivers are installed.
protocol.
failure. Turn on the server and reconfigure it each time.
v Any external devices.
v Surge-suppressor device (on the server).
v Modem, printer, mouse, and non-IBM devices.
v Each adapter (see "Removing an adapter" on page 110 and "Replacing an
adapter" on page 111).
v Hard disk drives (see "Removing a hot-swap hard disk drive" on page 117
and "Replacing a hot-swap hard disk drive" on page 118).
v Memory modules. The minimum configuration requirement is 2 GB (two 1
GB DIMMs). (See "Removing a DIMM" on page 137 and "Replacing a
DIMM" on page 138.)
The following minimum configuration is required for the server to turn on:
v I/O board
v Power supply
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Chapter 3. Diagnostics