Lenovo 3821, 3822, 3719, 3823 manual Solving undetermined problems

vCheck 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.

vCheck the LAN activity LEDs on the rear of the server. The LAN activity LED is 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.

vCheck for operating-system-specific causes of the problem.

vMake 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 “Software problems” on page 75.

Damaged data in CMOS memory or damaged Lenovo ThinkServer Server Firmware can cause undetermined problems. To reset the CMOS data, use the password switch 2 (SW4) to override the power-on password and clear the CMOS memory; see “Internal LEDs, connectors, and jumpers” on page 140.

Check the LEDs on all the power supplies (see “Power-supply LEDs” on page 88). 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.

vAny external devices.

vSurge-suppressor device (on the server).

vModem, printer, mouse, and non-Lenovo devices.

vEach adapter.

vHard disk drives.

vMemory modules. The minimum configuration requirement is 1 GB DIMM per microprocessor (2 GB in a two-microprocessor configuration).

The following minimum configuration is required for the server to start:

vOne microprocessor

vOne 1 GB DIMM

vOne power supply

vPower cord

vServeRAID SAS adapter

vSystem board assembly

124ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual