3Com 3C6090 User Guide - Page 17

2 TROUBLESHOOTING AND REPLACING THE DPE MODULE This chapter provides information on troubleshooting and replacing the DPE module. Startup Problems Table 2-1 lists symptoms of DPE module startup problems (abnormal LED patterns and error messages). . Table 2-1 Troubleshooting the DPE Module Symptom LEDs fail to light at initial power-on or during a reset. LCD and terminal displays freeze and nothing happens when either the Enter or Return key is pressed. Cause and Action No power to the system or the DPE module connectors are not properly mated with the backplane connecters. 1 Turn off the NETBuilder II system. 2 Verify that the power cord is plugged properly into the system's power supply module and into a working outlet. 3 Inspect the system's in-line power fuse and replace it, if necessary. Use the appropriate procedure in Installing the NETBuilder II Bridge/Router. 4 Turn on the system. 5 If the LEDs still do not light, remove and reinstall the DPE module. 6 If the LEDs still fail to light, contact your network supplier. Reset the system by pressing the two outer buttons on the LCD control panel. If this does not resolve the problem, call your network supplier.