16 power supply, 17 system board, 18 power supply unit (psu) thermal sensor – Dell OptiPlex 790 (Early 2011) User Manual
Page 5: 19 system setup, 20 troubleshooting

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18 Power Supply Unit (PSU) Thermal Sensor.........................................57
Removing The PSU Thermal Sensor
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Installing The PSU Thermal Sensor
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Alert! Security override Jumper is installed.
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Bad error-correction code (ECC) on disk read
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