Lenovo Q200 Q200 Hardware Replacement Guide - Page 20

7. Install the new power supply assembly into the chassis so that the screw holes in the power supply assembly align with those in the chassis. Note: Use only the screws provided by Lenovo. 8. Install and tighten the three screws at the rear of the chassis to secure the power supply assembly. 9. Reconnect all the power supply cables to the drives and the system board. 10. Refer to the "Completing the installation". Replacing the heat sink assembly Attention Do not remove the computer cover or attempt any repair before reading the "Important safety information" in the Safety and Warranty Guide that was included with your computer or in the Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Safety and Warranty Guide or HMM, go to the Support Web site at http://www.lenovo.com/support. To replace the heat sink assembly: 1. Remove the computer cover. Refer to "Removing the computer cover". 2. Lay the computer on its side. 3. Locate the heat sink. Refer to "Identifying parts on the system board". 4. Disconnect all cables connected to the system board.Carefully take note of the location of all cable connections on the system board. 5. Lift the system board out of the chassis carefully. Refer to the "Replacing the system board". 6. Disconnect the heat sink and the fan assembly cable from the system board. 7. Remove the four screws securing the heat sink and fan assembly to the system board. 31032756_HaWaii-HRG_EN.indd 17 Hardware Replacement Guide 17 2008.1.8 3:31:34 PM