Lenovo H430 Hardware Replacement Manual page 37

4. Reconnect the external cables and power cords to the computer. Refer to
"Locating connectors on the front of the computer" and "Locating connectors
on the rear of the computer".
Note: In most areas of the world, Lenovo requires the return of the defective
CRU. Information about this will come with the CRU or will come a few days
after the CRU arrives.
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Hardware Replacement Guide