Lenovo 6234A1U User Manual - Page 39
Replacing the heat sink and fan assembly
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8. Install the new power supply assembly into the chassis so that the screw holes in the new power supply assembly align with those in the chassis. 9. Install and tighten the four screws at the rear of the chassis to secure the power supply assembly. Note: Use only the screws provided by Lenovo. 10. Reconnect all the power supply assembly cables to the drives and the system board. 11. Go to "Completing the parts replacement" on page 37. Replacing the heat sink and fan assembly Attention Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to: http://www.lenovo.com/support This section provides instructions on how to replace the heat sink and fan assembly. CAUTION: The heat sink and fan assembly might be very hot. Turn off the computer and wait three to five minutes to let the computer cool before opening the computer cover. To replace the heat sink and fan assembly: 1. Open the computer cover. See "Opening the computer cover" on page 14. 2. Pivot the drive bay assembly upward to gain access to the heat sink and fan assembly. 3. Locate the heat sink and fan assembly and disconnect the heat sink and fan assembly cable from the system board. See "Locating parts on the system board" on page 11. Chapter 2. Installing options and replacing hardware 31