Allied Telesis AT-LX3800U - Manual (Page 71)

71
Chapter 3
Troubleshooting
This chapter contains information about how to troubleshoot the chassis
and line cards in the event that a problem occurs.
Note
If after following the instructions in this chapter you are unable to
resolve the problem, contact Allied Telesyn Technical Support for
assistance. Refer to “Contacting Allied Telesyn” on page 16 for
contact information.
PA or PB LED for the System is Off or Flashing
The chassis must have at least one operational power supply, indicated by
the PA (power supply A) and PB (power supply B) LEDs.
If all LEDs, including those on the chassis and line cards, are off, do one or
all of the following:
ˆ Verify that the On/Off switch for that power supply is turned to On.
ˆ Replace the AC power cord.
ˆ Verify that the power supply is completely installed in its slot.
If one of the power supply LEDs is off, but the other LED is on, do the
following:
ˆ Verify that the power supply in question is completely installed in its
slot.
If one or both of the power supply LEDs are slowly flashing, do the
following:
ˆ Verify that the On/Off switch for that power supply is turned to On.
ˆ Verify that the power cord is secured in the connector.
If one or both of the power supply LEDs are quickly flashing, verify that the
fans are still operational.