a.Base Cover

b.Battery

3.Perform the following steps as shown in the illustration:

a.Lift the locking tab [1].

b.Disconnect the I/O port cable that secures the system fan [2].

c.Lift the I/O port cable that secures the system fan [3].

4.Perform the following steps as shown in the illustration:

a.Disconnect the fan cable from the computer [1].

b.Unroute the cable from the slot [2].

5.Perform the following steps as shown in the illustration:

a.Loosen the scew that secures the system fan to the computer [1].

b.Lift the system fan from the computer [2].

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Dell 3550 owner manual Base Cover Battery