Fix NUC8i7BEH overheating

はじめに

The small form factor makes the NUC too prone to overheating due dust accumulation in the CPU cooler air outlet fins

必要な工具と部品

手順1 Turn NUC upside down

Fix NUC8i7BEH overheating, Turn NUC upside down: 手順 1、 3の画像 1

Fix NUC8i7BEH overheating, Turn NUC upside down: 手順 1、 3の画像 2

Fix NUC8i7BEH overheating, Turn NUC upside down: 手順 1、 3の画像 3

Place the NUC upside down and select a PH2 Phillips screw driver bit

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手順2 Unscrew lower lid

Fix NUC8i7BEH overheating, Unscrew lower lid: 手順 2、 2の画像 1

Fix NUC8i7BEH overheating, Unscrew lower lid: 手順 2、 2の画像 2

Start by using a Phillips head #2 screw driver to remove the lower screws on the lower case door.
These screws are held in with retainers, so they won't fall out when you flip the lid.

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手順3 Lid and HDD Bracket

Fix NUC8i7BEH overheating, Lid and HDD Bracket: 手順 3、 3の画像 1

Fix NUC8i7BEH overheating, Lid and HDD Bracket: 手順 3、 3の画像 2

Fix NUC8i7BEH overheating, Lid and HDD Bracket: 手順 3、 3の画像 3

Lift the door, and keep an eye on the cables that connect to the NUC's motherboard. These cables are the power and data cables for the 2.5" hard drive bay.
Carefully unplug the cables from the motherboard, and set the bracket aside.
In the last photo, the slot for a blade SSD is marked with a red arrow. This is where you would install the blade SSD, and use a screw to hold it in place.

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手順4 SSD removal

Fix NUC8i7BEH overheating, SSD removal: 手順 4、 2の画像 1

Fix NUC8i7BEH overheating, SSD removal: 手順 4、 2の画像 2

Change the screw driver bit to the PH1 one.
Unscrew the V-NAND SSD and carefully slide it out of its connector.

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手順5 SSD removal (video)

Previous step as video

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手順6 Motherboard Removal (Screw driver)

Fix NUC8i7BEH overheating, Motherboard Removal (Screw driver): 手順 6、 1の画像 1

Change the screw driver bit to PH1

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手順7 Motherboard Removal

Fix NUC8i7BEH overheating, Motherboard Removal: 手順 7、 3の画像 1

Fix NUC8i7BEH overheating, Motherboard Removal: 手順 7、 3の画像 2

Fix NUC8i7BEH overheating, Motherboard Removal: 手順 7、 3の画像 3

Unscrew the screws marked in red circles

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手順8 Motherboard Removal, continued.

Fix NUC8i7BEH overheating, Motherboard Removal, continued.: 手順 8、 3の画像 1

Fix NUC8i7BEH overheating, Motherboard Removal, continued.: 手順 8、 3の画像 2

Fix NUC8i7BEH overheating, Motherboard Removal, continued.: 手順 8、 3の画像 3

Remove the WiFi and Bluetooth antenna cables (be extremely careful when doing this otherwise you risk to rip the base contact terminal off the PCB)
Remove the stereo mic cable from the motherboard connector.
Pay attetion to the WiFi cable hidden under a black piece of tape

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手順9 Motherboard Removal, continued (video).

Disconnect mic cable

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手順10 Remove protection padding

Remove padders from the sides

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手順11 Remove protection padding, continued

Fix NUC8i7BEH overheating, Remove protection padding, continued: 手順 11、 2の画像 1

Fix NUC8i7BEH overheating, Remove protection padding, continued: 手順 11、 2の画像 2

Not all are necessary only the two depicted.

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手順12 Motherboard Removal, final step

Fix NUC8i7BEH overheating, Motherboard Removal, final step: 手順 12、 3の画像 1

Fix NUC8i7BEH overheating, Motherboard Removal, final step: 手順 12、 3の画像 2

Fix NUC8i7BEH overheating, Motherboard Removal, final step: 手順 12、 3の画像 3

Use a pry tool to lift the motherboard from the casing
Marked with red circles the dust signs evident on first sight

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手順13 Remove CPU fan

Fix NUC8i7BEH overheating, Remove CPU fan: 手順 13、 3の画像 1

Fix NUC8i7BEH overheating, Remove CPU fan: 手順 13、 3の画像 2

Fix NUC8i7BEH overheating, Remove CPU fan: 手順 13、 3の画像 3

Remove the 3 screws fixing the CPU fan
Remove the fan power connect from the motherboard

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手順14 Blast off dust from CPU air exit fins

Fix NUC8i7BEH overheating, Blast off dust from CPU air exit fins: 手順 14、 3の画像 1

Fix NUC8i7BEH overheating, Blast off dust from CPU air exit fins: 手順 14、 3の画像 2

Fix NUC8i7BEH overheating, Blast off dust from CPU air exit fins: 手順 14、 3の画像 3

You will need to use compressed air, a small vacuum cleaner or something similar to blast off all the stucked dust.

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手順15 Blast off dust from CPU air exit fins, continued

Fix NUC8i7BEH overheating, Blast off dust from CPU air exit fins, continued: 手順 15、 1の画像 1

I'm using a compressed air can (optional)

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手順16 Blast off dust from CPU air exit fins, continued

Video of the procedure

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手順17 Blast off dust from CPU air exit fins, continued

Video of the procedure

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手順18 Exchange thermal paste for CPU cooler (optional)

Fix NUC8i7BEH overheating, Exchange thermal paste for CPU cooler (optional): 手順 18、 2の画像 1

Fix NUC8i7BEH overheating, Exchange thermal paste for CPU cooler (optional): 手順 18、 2の画像 2

This step is probably not necessary, but for the sake of completeness here it is.
Remove the screws holding the CPU cooler following the numbers on them.

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