Acer Aspire X3990 Acer Aspire X3990 Desktop Service Guide - Page 35
Removing the Heat Sink Fan Assembly, WARNING
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Removing the Heat Sink Fan Assembly WARNING:The heat sink becomes very hot when the system is on. NEVER touch the heat sink with any metal or with your hands. 1. Use a long-nosed screwdriver to loosen the four screws on the heat sink, in the order as shown below. Note:CPU Fan has been highlighted with the yellow circle as above image shows.Please detach the CPU Fan and follow local regulations for disposal. 2. Lift the heat sink fan assembly away from the mainboard. 27 Chapter 3