Dell Inspiron 17-5749 Heat-sink Assembly Replacement

Turn off power to the laptop.

Unplug the charging cable from the laptop.

Switch each of the battery latches to the "unlocked" position.

Pull battery upwards by the tab to remove from the laptop.

Remove the two 5.5mm screws that secure the base cover to the computer's base.

Using the plastic opening tool, carefully pry open the base cover starting from the center.

Lift the base cover upwards to remove and set it aside.

Remove the 5.5mm screw that secures the optical-drive assembly to the computer base

Using your fingertips, slide the optical-drive assembly out of the optical drive bay.

Remove the 2.5mm screw that secures the optical-drive bracket to the optical drive assembly.

Remove the optical-drive bracket from the optical-drive assembly.

Carefully pull the optical-drive bezel and remove it from the optical drive.

Remove the 2.5mm screw that secures the hard-drive assembly to the computer base.

Using the pull tab, slide the hard-drive assembly to disconnect it from the system board.

Lift the hard-drive assembly off the computer base

Disconnect the antenna cables from the wireless card.

Push the securing tab to release the wireless card.

Slide the wireless card out of the wireless-card slot.

Turn the computer over and open the display as far as possible

Using a plastic opening tool, release the tabs that secure the keyboard to the palm-rest assembly.

Carefully turn the keyboard over and place it on the palm rest assembly.

Lift the latches and disconnect the keyboard cable and keyboard back-light cable from the system board.

Lift the keyboard along with the cables, off the palm-rest assembly and set it aside.

Remove the (5) 5.5mm screws that secure the palm rest to the system board.

Close the display and turn the computer over.

Remove the (10) 5.5mm screws that secure the palm rest to the computer base.

Turn the computer over and open the display as far as possible.

Lift the connector latches and disconnect the power-button board cable and the touch-pad cable from the system board.

Using a plastic scribe, gently lift and release the tabs on the palm rest around the computer base including the backside.

Lift the palm rest away from the display assembly.

Remove the 2.5mm screw that secures the optical-drive connector board to the computer base.

Move wireless card wires covering the board away from the board.

Slide the optical-drive connector board away from the computer base.

Lift the optical-drive connector board away from the computer base.

Remove the 5.5mm screws that secure the battery-connector board to the computer base.

Carefully lift the battery-connector board to disconnect it from the system board.

Close the display and turn the computer over.

Remove the antenna cables from the routing guides on the computer base.

Slide the antenna cables through the slot on the computer base.

Turn the computer over and open the display as far as possible.

Peel off the tape that secures the display cable to the system-board assembly.

Lift the connector latch and disconnect the display cable from the system board.

Lift the connector latch and disconnect the I/O board cable from the system board.

Disconnect the speaker cable from the system board.

Disconnect the power-adapter port cable from the system board.

Remove the 5.5mm screws that secure the system-board assembly to the computer base.

Lift the system-board assembly off the computer base.

Turn the system-board assembly over and place it on a flat and clean surface.

In sequential order (indicated on the heat sink), loosen the (3) captive 5.5mm screws that secure the heat-sink assembly to the system board.

Disconnect the fan cable from the system board.

Lift the heat-sink assembly off the system board.