3Com CoreBuilder 3500, Getting Started Manual

Page: 63 / 96

Diagnosing Problems 63
Table 16 Troubleshooting Abnormal Activity on the Module Status LEDs
LED Status Possible Sources of the Problem Steps to Take
PWR LED lights yellow. Module has failed. Replace the module with a new one.
INS LED lights yellow. Module is not completely inserted. Reseat the module.
ERR LED lights steady yellow. Module has failed. Replace the module with a new one.
ERR LED blinks yellow. Hardware/software incompatibility 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.
E LED (Error - Port Status) lights yellow
■
System does not recognize a
connection to the port.
■
Cabling is not fully attached to the
port.
■
Cable to the port is faulty.
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.