Acer X270 사용자 설명서

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Chapter 3
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.