S033CAUTION:Hazardous energy present. Voltages with hazardous energy might cause heating when shorted withmetal, which might result in spattered metal, burns, or both.S017CAUTION:Hazardous moving fan blades nearby. Keep fingers and other body parts away.Attention:• Read “Installation Guidelines” on page 47 and “Safety inspection checklist” on page 48 to ensure that youwork safely.• Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices withan electrostatic-discharge wrist strap or other grounding system.• When removing a hot-swap fan without powering off the server, do not touch the system fan cage. Withpower on, complete the replacement within 30 seconds to ensure proper operation.ProcedureStep 1. If the server is installed in a rack, slide the server out on its rack slide rails to gain access to the topcover, or remove the server from the rack. See “Remove the server from rack” on page 63.Step 2. Remove the top cover. See “Remove the top cover” on page 277.Step 3. Remove the system fan.Chapter 5. Hardware replacement procedures 265