Acer Aspire X3990 Acer Aspire X3990 Desktop Service Guide - Page 33
Pre-disassembly Procedure
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Pre-disassembly Procedure Before proceeding with the disassembly procedure, perform the steps listed below: 1. Turn off the system and all the peripherals connected to it. 2. Unplug the power cord from the power outlets. 3. Unplug the power cord from the system. 4. Unplug all peripheral cables from the system. 5. Place the system unit on a flat, stable surface. 25 Chapter 3