IBM 847661U Hardware Maintenance Manual - Page 204
The Ethernet Activity light, Mbps or 100 Mbps.
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Symptom The Ethernet Activity light does not come on. Data is incorrect or sporadic. The Ethernet controller or adapter stopped working when another adapter was added to the server. The Ethernet controller or adapter stopped working without apparent cause. FRU/Action 1. Make sure the network device drivers are loaded. 2. Check all connections. 3. Try sending data from this workstation. 4. Use another Ethernet adapter (see "Installing or removing ISA and PCI adapters" on page 62). 5. Use another port on the hub. 6. Make sure that the hub port is configured for the correct speed (10 Mbps or 100 Mbps). 7. If duplex mode was forced, make sure a speed of 10 Mbps or 100 Mbps was forced. 8. If you manually configured the duplex mode, make sure that you also manually configured the speed. 9. System Board 1. Make sure that you are using Category 5 cabling when operating the server at either 10 Mbps or 100 Mbps. 1. Make sure that the cable is connected to the Ethernet adapter. 2. Make sure that the PCI system BIOS is current. 3. Reseat the adapter. 4. System Board 1. Reseat the adapter. 2. Try a different connector at the hub or switch. 3. The network device driver files might be missing or corrupted; 4. System Board 196 Netfinity Server HMM