Dell OptiPlex 755 User Manual page 226

NOTICE:
To prevent static damage to components inside your computer, discharge static electricity from your
body before you touch any of your computer's electronic components. You can do so by touching an unpainted
metal surface on the computer chassis.
1 Follow the procedures in "Before You Begin" on page 21.
2 Remove the cover of your computer (see "Removing the Computer Cover" on page 168).
3 Disconnect the cables from the system board.
4 Remove the speaker from the chassis of the computer.
5 Replace the computer cover.
6 Turn on power to the computer.
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Speakers