JUNOS Internet Software Network Operations Guide: Hardware
566 ! Replacing a Control Board
Replacing a Control Board
The Control Board can fail and not start, or it can cause a connectivity problem
between the Routing Engine and the Packet Forwarding Engine components. You
can perform a swap test on the Control Board to try to pinpoint the problem.
Action To replace a Control Board, see “Component Fuses in the M320 Router Midplane”
on page 311.
Returning the Control Board
Action To return the Control Board, follow these steps:
1. Locate the serial number ID label on the bottom of the left side of the Control
Board (see “Locate the Control Board Serial Number ID Label” on page 314).
2. Follow the procedure “Return the Failed Component” on page 86. You can also
refer to the procedure to return a field-replaceable unit in the M320 router,
T320 router, or the T640 routing node hardware guides.
CAUTION: Before performing a swap test, always check for bent pins in the
midplane and check the Control Board for stuck pins in the connector. Pins stuck
in the component connector can damage other good slots during a swap test.
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