Adding and Replacing Parts 1378 Turn the system top-side up again, and remove the four M2.5 x 6-mm screws from thesystem-board top assembly.9 With the front of the computer facing you, lift the system-board top assembly from the rightside, swinging it up, then lift the left side and draw the system-board top assembly out of thecomputer.Installing the System Board1 Perform all of the steps in "Removing the System Board" on page 135 in reverse order.NOTICE: Before turning on the computer, replace all screws and ensure that no stray screws remaininside the computer. Failure to do so may result in damage to the computer.2 Turn on the computer.NOTE: After replacing the system board, you must enter the computer Service Tag sequence into theBIOS of the replacement system board as part of the BIOS update procedure.3 Insert the flash BIOS update program floppy disk or CD that accompanied thereplacement system board into the appropriate drive. Follow the instructions that appearon the screen.system-board topassembly
