Solving Undetermined Problems - Lenovo x3550 M4 Installation 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
Results
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

If Dynamic System Analysis (DSA) did not diagnose the failure or if the server is
inoperative, use the information in this section.
About this task
If you suspect that a software problem is causing failures (continuous or
intermittent), see "Software problems" on page 169.
Corrupted data in CMOS memory or corrupted UEFI firmware can cause
undetermined problems. To reset the CMOS data, use the CMOS clear jumper (JP1)
to clear the CMOS memory and override the power-on password; see Table 2 on
page 30 for more information. If you suspect that the UEFI firmware is corrupted,
see "Recovering the server firmware (UEFI update failure)" on page 174.
If the power supplies are working correctly, complete the following steps:
Procedure
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
4. Turn on the server.
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System x3550 M4 Type 7914: Installation and Service Guide
– The Ethernet link status LED is lit when the Ethernet controller receives a link
pulse from the hub. If the LED is off, there might be a defective connector or
cable or a problem with the hub.
– The Ethernet transmit/receive activity LED is lit when the Ethernet controller
sends or receives data over the Ethernet network. If the Ethernet
transmit/receive activity is off, make sure that the hub and network are
operating and that the correct device drivers are installed.
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 Printer, mouse, and non-IBM devices.
v Each adapter.
v Hard disk drives.
v Memory modules. The minimum configuration requirement is 2 GB DIMM
in slot 1.