Solving Undetermined Problems - Lenovo ThinkServer RD220 Hardware Maintenance Manual

Try the following procedures:
• Make sure that the correct device drivers, which come with the server, are installed and that they are at
the latest level.
• Make sure that the Ethernet cable is installed correctly.
– The cable must be securely attached at all connections. If the cable is attached but the problem
remains, try a different cable.
– You must use Category 5 cabling.
• Determine whether the hub supports auto-negotiation. If it does not, try configuring the integrated
Ethernet controller manually to match the speed and duplex mode of the hub.
• Check the Ethernet controller LEDs on the rear panel of the server. These LEDs indicate whether there
is a problem with the connector, cable, or hub.
– 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 light is off, make sure that the hub
and network are operating and that the correct device drivers are installed.
• Check the Ethernet activity LED on the rear of the server. The Ethernet activity LED is lit when data is
active on the Ethernet network. If the Ethernet activity LED 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 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 the Installation
and User Guide.
Damaged data in CMOS memory or damaged UEFI code can cause undetermined problems. To reset the
CMOS data, use the CMOS switch to clear the CMOS memory; see System-board switches and jumpers. If
you suspect that the UEFI code is damaged, see Recovering the UEFI code.
Check the LEDs on all the power supplies (see Power-supply LEDs). 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 failure. Turn on the server
and reconfigure it each time.
• Any external devices.
• Surge-suppressor device (on the server).
• Modem, printer, mouse, and non-IBM devices.
• Each adapter.
• Hard disk drives.
• Memory modules. The minimum configuration requirement is 1 GB DIMM per installed microprocessor.
• Service processor (RMM).
The following minimum configuration is required for the server to start:
• One microprocessor
• One 1 GB DIMM
• One power supply
• Power backplane
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ThinkServer RD220 Hardware Maintenance Manual