Problem Solving Using LEDs

Problem Solving Using LEDs

When diagnosing a problem with the module, note that the problem is often indicated by the combined states of the module LEDs. Table A-2lists the typical combined states of the LEDs for various error conditions that can occur during initial installation of the device, along with probable causes and corrective actions to take.

NOTE

If any of the following problems persist after taking corrective action, either replace the module or contact your DIGITAL service representative.

Table A-2:Problem Solving Using the LEDs

Symptom

Probable Cause

Corrective Action

 

 

 

 

 

Power LED

The module is not

Check the power status on the Chassis

is off.

receiving +5 Vdc.

Manager status display.

 

 

If the Chassis Manager status display

 

 

indicates that power is available for

 

 

this module, press the release lever and

 

 

reseat or remove the module.

 

 

Inspect the module’s 48- or 160-pin

 

 

connector for bent or broken pins. If

 

 

any are bent or broken, replace the

 

 

module.

Module OK

Self-test failed.

If the LED does not light within 3

LED is off.

 

minutes, lift and reseat the release

 

 

lever momentarily to repeat the self-

 

 

test.

Module OK

A nonfatal error

Contact your DIGITAL service

LED is

occurred.

representative.

flashing, but

 

 

 

module

 

 

 

continues to

 

 

 

operate

 

 

 

normally.

 

 

 

 

 

(continued on next page)

Problem Solving A-5

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Network Technologies 900GV manual Problem Solving Using LEDs

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