Acer Aspire X3990 Acer Aspire X3990 Desktop Service Guide - Page 66

Install the Main Board, Put M/B in the chassis aligning the M/B I/O connector with I/O shielding.

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Install the Main Board 1. Put M/B in the chassis aligning the M/B I/O connector with I/O shielding. 2. Fix1~ 6 pcs screws into the corresponding hole. NOTE: Make sure the I/O spring touching M/B after installing. Chapter 3 58

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