Dell OptiPlex FX170 Motherboard Replacement

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Disconnect the speaker cable from the motherboard by gently pulling it straight up to disengage it from the port.
Remove the four 4mm Philips #0 screws that secure the motherboard to the case.
The screw in the corner where the RAM is located is covered by a small piece of Mylar tape, peel this tape back to reveal the screw. The tweezers can be helpful for this.

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