Network Technologies 900GV - Manual (Page 63)

Problem Solving A-5
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-2 lists 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
(continued on next page)
Symptom Probable Cause Corrective Action
Power LED
is off. The module is not
receiving +5 Vdc. Check the power status on the Chassis
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
LED is off. Self-test failed. If the LED does not light within 3
minutes, lift and reseat the release
lever momentarily to repeat the self-
test.
Module OK
LED is
flashing, but
module
continues to
operate
normally. A nonfatal error
occurred. Contact your DIGITAL service
representative.