6 TROUBLESHOOTINGThis chapter describes how to isolate and solve3C359B NIC hardware and network cabling problems.3C359B NIC LEDsLight-emitting diodes (LEDs) on the backplate of the3C359B NIC, shown in Figure 21, indicate the configuredring speed and whether or not the 3C359B NIC is insertedinto the ring. The LEDs also light when drivers are loadingand when the diagnostics program is running.Figure 21 NIC LEDsWhen the green LED (labeled “4”) is lit, it indicates that the3C359B NIC is set to 4 Mbps speed and is correctlyinserted into the token ring network.When the yellow LED (labeled “16”) is lit, it indicates thatthe 3C359B NIC is set to 16 Mbps and is correctly insertedinto the token ring network.416Data4 Mbps16 Mbps
