JUNOS Internet Software Network Operations Guide: Hardware
302 !
Verifying Control Board Failure on page 310
1. Check the Control Board Connection on page 310 1. Make sure that the Control Board is properly seated in the
midplane.
2. Ensure that none of the pins are bent.
3. Check the thumbscrews on the ejector locking tabs.
2. Check the Control Board Fuses on page 311 The fuses for the Control Boards are located in the rear of the
midplane behind the power supply in slot
PEM0.
3. Perform a Control Board Swap Test on page 312 1. Take the host subsystem offline if the Control Board is
master.
2. Replace the Control Board with one that you know works.
3. Bring the Control Board online.
4. Check the Control Board status.
4. Display the Control Board Hardware Information on
page 313
show chassis hardware
5. Locate the Control Board Serial Number ID Label on
page 314
Look on the bottom of the left side of the Control Board.
Returning the Control Board on page 314
Follow the procedure in the appropriate hardware guide.
Monitor the Control Board Tasks Command or Action
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