Lenovo ThinkSystem DE Series Manual page 114

(1) Internal Cache Active
(2) Battery
3. Using a #1 Phillips screwdriver, remove the screws that attach the HIC faceplate to the
controller canister.
There are four screws: one on the top, one on the side, and two on the front.
4. Remove the HIC faceplate.
5. Using your fingers or a Phillips screwdriver, loosen the three thumbscrews that secure the HIC
to the controller card.
6. Carefully detach the HIC from the controller card by lifting the card up and sliding it back.

Be careful not to scratch or bump the components on the bottom of the HIC
or on the top of the controller card.
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