D-Link DES-7200 Hardware Installation Manual page 68

5.2 Common Troubleshooting
Procedures
Fault 1: The system login password is lost.
[Fault Description]
The s ystem l ogin password of t he s witch is f orgotten or l ost, a nd s o it i s no t possible t o
configure the data.
[Troubleshooting]
Please contact D-Link Customer Service Department for technical support.
Fault 2: The AC power module does not work.
[Fault Description]
The Status L ED of eac h line c ard i s OFF, t he Power LED of the fan tray is OFF (only f or
DES-7210), and the fan does not work.
The LED on the panel of the power module is OFF. The fan does not work.
[Troubleshooting]
First place the switches of all the power modules to OFF. Check if the cables of the cabinet
have been correctly connected. Check whether the power cables are tightly connected to the
cabinet power sockets and power modules. Check whether the power modules are installed
correctly. If necessary, check whether the connectors on the backboard of the power system
are tightened. Check if there is a mix of AC and DC power supplies.
Fault 3: The DC power module does not work.
[Fault Description]
The Status L ED of eac h line c ard i s OFF, t he Power LED of the fan tray is OFF (only f or
DES-7200), and the fan does not work.
The LED on the panel of the power module is OFF. The fan does not work.
[Troubleshooting]
First place the switches of all the power modules to OFF. Check if the cables of the cabinet
have been c orrectly c onnected. Check whether the cabinet power s ockets and DC po wer
modules ar e t ightly c onnected i n a c orrect w ay. Check w hether t he p ower m odules ar e
installed c orrectly. I f nec essary, pull out the power modules and c heck whether the
connectors on the backboard of the power system are tightened. Check if there is a mix of
AC and DC power supplies.
Fault 4: An exception occurs to the LEDs when cable cards are powered on.
[Fault Description]
The Status LED of the line card is OFF, flashing, or RED. The Link/ACT LED of the line card
is solid ON when no network cable or optical fiber is plugged.
[Troubleshooting]
Check if the line card is firmly inserted. If yes, install the line card again and ensure that it is
inserted into position, before you tighten the fastening screws. If the line card still does not
work, check if the connector of the slot on the backplane is loose. If yes, insert the board to
another slot for a try. If the slot and connection are not the cause, return the line card for
repair.
5-2
DES-7200 Hardware Installation Guide