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7–18 433611-001 Service Reference Guide, dx7300
Removal and Replacement Procedures— Slim Tower (ST) Chassis
7.10 PCI Riser Card Assembly and Backwall
1. If you have locked the Smart Cover Lock, use Computer Setup to unlock the lock
(Section 7.2).
2. Prepare the computer for disassembly (Section 7.1).
3. Remove the computer cover (Section 7.5).
4. Remove all PCI and PCI Express expansion cards from the PCI expansion slots
(Section 7.9).
5. Rotate the optical and diskette drive cage to its upright position.
6. Remove the security clip (Section 7.4.1), rotate the power supply to its full upright
position 1, then lift the power supply straight up and out of the chassis 2.