Dear friend!
You usually need to do the following steps:
1. Select the spare part
2. Query and record the current alarms of the board.
3. If the board to be replaced is connected by fibers, record the positions of fiber connections and remove the fibers by using a fiber extraction tool.
4. Replace the board.
5. Recover the fiber connections of the replaced board.
6. Check whether the board works normally. Check the STAT indicator on the board. If the indicator is on and green, the board works normally. Query the alarms of the board and check whether there are new abnormal alarms.
For more information, please click: Replacing an EOS Board
Thanks!