Dell OptiPlex 755 User's Guide - Page 29
Inside Your Computer, Chassis Intrusion Switch - power supply
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Inside Your Computer CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. CAUTION: To avoid electrical shock, always unplug your computer from the electrical outlet before removing the computer cover. NOTICE: Be careful when opening the computer cover to ensure that you do not accidentally disconnect cables from the system board. 3 2 1 4 5 6 7 1 optical drive 4 optional chassis-intrusion switch 7 hard drive 2 disk drive 5 system board 3 power supply 6 heat sink assembly Chassis Intrusion Switch CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. NOTE: The chassis intrusion switch is standard on the ultra small form factor computer but is optional on mini tower, desktop and small form factor computers; it may not be present on your computer. 29 Mini Tower Computer