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The FastHub 116T LEDs facilitate troubleshooting during ongoing operation. Table 4-1 displays the potential problem symptoms, possible causes, and corrective actions.
Table 4-1 Troubleshooting
| Symptom | Possible Cause | Corrective Action(s) |
| Power LED does not come on | Power switch off | Turn on switch |
| Power cord not connected | Plug in both ends of power cord | |
| Fuse blown | Replace fuse. If problem reoccurs, contact Cisco Systems or your authorized reseller | |
| Other | Contact Cisco Systems or your authorized reseller | |
| Link LED does not come on | No cable inserted | Insert both ends of cable into a device |
| Device(s) not powered | Ensure both devices have power | |
| Wrong cable type | Verify cable selection (crossover vs. non-crossover) | |
| Bad cable | Replace cable with known good one | |
| Disabled LED blinks | Device at other end malfunction-ing | Investigate device at other end of cable from the Disabling FastHub 116T port |
| Bad cable | Replace cable with known good one |
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