Dell OptiPlex 745c (Early 2007) - Manual (Page 104)

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Replacing the System Board
Dell™ OptiPlex™ 745c User's Guide
Removing the System Board
1. Follow the procedures in Before You Begin .
2. Remove any components that restrict access to the system board (optical drive(s), floppy drive, hard drive, I/O panel (as applicable).
3. Remove the processor and heat sink assembly. See Processor
4. Disconnect all cables from the system board.
5. Remove the screws from the system board. See Mini Tower System Board Screws
6. Slide the system board assembly toward the front of the computer, and then lift the board up and away.
Mini Tower System Board Screws
Place the system board assembly that you just removed next to the replacement system board to ensure it is identical.
Replacing the System Board
1. Gently align the board into the chassis and slide it toward the back of the computer.
2. Replace the screws on the system board.
3. Replace any components and cables that you removed from the system board.
4. Reconnect all cables to their connectors at the back of the computer.
5. Replace the computer cover (see Replacing the Computer Cover ).
NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the
computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.
1 mini tower system board 2 screws (10)