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Replacing the System Board
1. Replace the system board (see Figure4-31):
a. Lower the front of the system board into the system board tray, under the tray levers.
b. Lower the system board onto its grounding tabs in the system board tray and slide the system board back until the board's plunger snaps into
place.
2. Replace the system board tray (see "Replacing the System Board Tray").
3. Replace the system battery (see "Replacing the System Battery").
4. Replace the microprocessors and VRMs (see "Adding or Replacing a Microprocessor").
5. If necessary, replace the memory module, hardware key, and battery for the integrated RAID controller (see "Activating the Integrated RAID
Controller").
6. Install the memory modules (see "Installing Memory Modules").
7. Replace the expansion-card cage (see "Replacing the Expansion-Card Cage").
8. Replace the system fan bracket (see "Replacing the System-Fan Bracket").
9. Replace the cooling fans (see "Replacing a Cooling Fan").
10. Replace the power supplies (see "Replacing a Power Supply").
11. Replace the cover (see "Replacing the Cover").
12. Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.
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CAUTION: Before you perform this procedure, read the safety instructions in your System Information document.
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System Information document.