Dell OptiPlex 790 (Early 2011) - Manual (Page 39)

Front Thermal Sensor
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Removing the Front Thermal Sensor
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the cover .
3. Disconnect the thermal-sensor cable from the system board.
4. Unthread the thermal-sensor cable from the chassis clip.
5. Pry the thermal sensor away from the chassis front and remove.
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