Einleitung
If your Dell Inspiron 1721 has a loud fan or is prone to overheating, use this guide to replace the internal fan.
Internal fans circulate cool air to a heat-sink, allowing the CPU to stay at a low temperature, even during stressful performance. Dusty internal fans will restrict airflow in any device.
Before using this guide, verify that the computer is completely shutdown.
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Slide tabs outward to undo the locks.
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Grab and pull the battery away from the device to remove.
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Pry up on the corner of the hinge cover with an iFixit opening tool.
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Use the iFixit opening tool along both sides and the front of the hinge cover to release it.
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Lean the display back as far as it goes and lift up on the hinge cover to remove.
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Remove four 3mm Phillips #1 screws from the top of the keyboard.
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Use an iFixit opening tool to slide the keyboard upwards toward the display.
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Slide the keyboard until it is clear of the lock tab, and lift it up to remove.
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Lay the device flat and remove the 17 7mm Phillips #0 screws.
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Use an iFixit opening tool to separate the back cover.
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Remove the back cover.
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Unscrew the Phillips #0 screws attaching the heat sink to the motherboard.
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Carefully remove the heat sink from the motherboard.
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To reassemble your device, follow these instructions in reverse order.
