System Board 119System BoardCAUTION: Before working inside your computer, read the safety information thatshipped with your computer. For additional safety best practices information, seethe Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.CAUTION: To guard against likelihood of electric shock, laceration by moving fanblades, or other unexpected injuries, always unplug your computer from theelectrical outlet before removing the cover.NOTICE: The procedure for removing and replacing the system board is identical(except where noted) for the Vostro 420, Vostro 220, and Vostro 220s computers; theillustration provided is for example only and may not represent your particularcomputer precisely.Remove the System Board1 Follow the procedures in "Before Working on Your Computer" on page 35.2 Remove the computer cover (see "Removing the Computer Cover" onpage 47).3 For the Vostro 220s:a Remove the chassis support bracket (see "Removing the ChassisSupport Bracket" on page 55).b Slide the optical drive forward far enough to gain access to the PWR1connector on the system board.4 Remove all expansion cards (see "Removing a PCI or PCI Express Card" onpage 59). Store them temporarily in separate antistatic packaging toprevent damage from discharge of static electricity.5 Disconnect all the CD/DVD/hard drive data cables from the system board.6 Disconnect all front panel cables from the system board.7 Disconnect the DC power cables from the system board.8 If the system board is being replaced with another system board:a Remove the processor heat sink/fan assembly (see "Removing theProcessor Heat Sink/Fan Assembly" on page 99).
