Avoid contact with the hot computer. During operation, the computer becomes hot enough to burn the skin.Before you touch the computer, turn off the computer, disconnect power, and wait approximately 30 minutesfor the computer to cool.For access, do the following:1. Remove any media from the drives and turn off all connected devices and the computer.2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.3. Unlock any locking device that secures the computer cover.4. Remove the bracket, if any. See “DIN rail bracket kit” on page 20, “Physical lock kit and VESA mountbracket kit” on page 23, and “Power adapter bracket kit” on page 28.5. Turn over the computer so that the bottom cover is facing up.Replacement stepsChapter 5. CRU replacement 39

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