10. While supporting the power block, disconnect the signal and power cables on each side of the power block.
11. To replace the component, reverse the removal procedure.
12. Power on the system as follows:
a. Make sure that only the primary I/O module is inserted.
b. Power on the system.
c. Wait until the primary I/O module is ready (less than 1 minute).
d. Insert the secondary I/O module.
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Removal and replacement procedures