3.Disconnect the following power supply cables from the system board by pressing on the retention latch and lifting it upwards.

system fan power cable [1.2]

system board power cable [3,4]

a. Un-thread the power cables from the metal clips.

4.Follow the steps below to remove the power supply unit:

a.Remove the screws that secure the power supply to the computer.

b.Push-in on the blue release tab beside the power supply [1].

c.Slide the power supply unit towards the front and remove it from the computer [2].

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Image 14
Dell 3800 owner manual