Dell Vostro 1720 (Early 2009) - Manual (Page 32)

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Fan
Dell™ Vostro™ 1720 Service Manual
Removing the Fan
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the battery from the computer.
3. Remove the access panel from the computer.
4. Disconnect the fan cable from the system board.
5. Remove the three fan screws.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.