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– 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.
• Check for operating-system-specific causes of the problem.
• Make sure that the device drivers on the client and server are using the same protocol.
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) cannot diagnose the failure or if the server is inoperative, use the
information in this section to solve the undetermined problems.
If you suspect that a software problem is causing failures (continuous or intermittent), see "Power problems"
on page 145.
Corrupted data in CMOS memory or corrupted UEFI firmware can cause undetermined problems. To reset
the CMOS data, use the CMOS jumper to clear the CMOS memory and override the power-on password;
see "System-board switches and jumpers" on page 31. If you suspect that the UEFI firmware is corrupted,
see "Recovering the server firmware" on page 156.
If the power supplies are working correctly, complete the following steps:
Step 1.
Turn off the server.
Step 2.
Make sure that the server is cabled correctly.
Step 3.
Remove or disconnect the following devices, one at a time, until you find the failure. Turn on the
server and reconfigure it each time.
• Any external devices.
• Surge-suppressor device (on the server).
• Printer, mouse, and non-Lenovo devices.
• Each adapter.
• Hard disk drives.
• Memory modules. The minimum configuration requirement is 2 GB DIMM in slot 1 when one
microprocessor is installed in the server.
Step 4.
Turn on the server.
If the problem is solved when you remove an 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 riser card.
If you suspect a networking problem and the server passes all the system tests, suspect a network cabling
problem that is external to the server.
Problem determination tips
Because of the variety of hardware and software combinations that can encounter, use the following
information to assist you in problem determination. If possible, have this information available when
requesting assistance from Lenovo.
The model number and serial number are located on the ID label on the front of the server as shown in the
following illustration.
Note: The illustrations in this document might differ slightly from your hardware.
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System x3300 M4 Installation and Service Guide
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Table of Contents
Troubleshooting
