3Com CoreBuilder 3500 Getting Started Manual page 63

Table 16 Troubleshooting Abnormal Activity on the Module Status LEDs
LED Status
PWR LED lights yellow.
INS LED lights yellow.
ERR LED lights steady yellow.
ERR LED blinks yellow.
E LED (Error - Port Status) lights yellow
Possible Sources of the Problem
Module has failed.
Module is not completely inserted.
Module has failed.
Hardware/software incompatibility
System does not recognize a
connection to the port.
Cabling is not fully attached to the
port.
Cable to the port is faulty.
Steps to Take
Replace the module with a new one.
Reseat the module.
Replace the module with a new one.
1 If you have added a new module, remove it.
2 If you have just updated software, reload the old version of
software.
3 If the LED continues to blink, contact your network supplier or
3Com Technical Support for hardware/software incompatibility
information.
1 Verify that all cables are firmly inserted into the system's
affected port and the attached device.
2 Verify that the cables are clean.
3 Test for faulty cables.
When the problem is corrected, the L LED (Link - Port Status)
lights green.
4 If the port status E LED (Error - Port Status) remains yellow,
contact your network supplier or 3Com Technical Support.
Diagnosing Problems 63