Lenovo Thinkpad T450 Daughterboard Replacement

はじめに

Also known as the daughter card, piggyback card, or mezzanine board, the daughterboard is an extension of the motherboard. The daughterboard is typically connected to the motherboard via a series of cables. Similar to the motherboard, the daughterboard has pins, plugs, sockets, and connectors to be attached to other boards.

As for the Lenovo ThinkPad T450 laptop, the daughterboard houses the USB port on the upper left side of the laptop. If you find that the devices you plug into this USB port are not being recognized, it may be time to replace the daughterboard. Follow these simple instructions to replace the daughterboard in your device.

必要な工具と部品

手順1 External Battery

Lenovo Thinkpad T450 Daughterboard Replacement, External Battery: 手順 1、 3の画像 1

Lenovo Thinkpad T450 Daughterboard Replacement, External Battery: 手順 1、 3の画像 2

Lenovo Thinkpad T450 Daughterboard Replacement, External Battery: 手順 1、 3の画像 3

Using your hands, slide the two locking tabs away from each other to release the battery.
Slide the battery up and out of the device.

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手順2 Back Cover

Lenovo Thinkpad T450 Daughterboard Replacement, Back Cover: 手順 2、 1の画像 1

Using the JIS #00 screwdriver, unscrew seven screws from the back cover.
These screws are not removable and will remain in the back cover.
Use the JIS #00 screwdriver to remove the single 2.8 mm screw from the back cover.

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手順3

Lenovo Thinkpad T450 Daughterboard Replacement: 手順 3、 3の画像 3

Insert a plastic opening tool into the edges of the laptop and work your way around the edges to pry off the back cover from the device.
Remove the back cover from the device.

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手順4 RAM

Lenovo Thinkpad T450 Daughterboard Replacement, RAM: 手順 4、 2の画像 1

Lenovo Thinkpad T450 Daughterboard Replacement, RAM: 手順 4、 2の画像 2

Lift up the black piece of tape and remove it to uncover the RAM sticks underneath.

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手順5

Using your fingers, push the two clips securing the RAM away from each other to release the RAM.
The RAM stick should pop up at a 30 degree angle.
Remove the RAM stick from the device.
Repeat this step for any additional RAM sticks.

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手順6 Fan and Heatsink Assembly

Lenovo Thinkpad T450 Daughterboard Replacement, Fan and Heatsink Assembly: 手順 6、 1の画像 1

Using the JIS #00 screwdriver, unscrew the four screws securing the fan and heatsink assembly to the motherboard.
These screws are not removable and will stay on the fan and heatsink assembly.

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手順7

Disconnect the fan and heatsink assembly from the motherboard using the plastic opening tool.

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手順8

Lift up the fan and heatsink assembly and remove it from the device.
When you reassemble your device, don't forget to reapply thermal paste to the back of the heatsink and fan assembly. For proper technique and thermal paste application, please visit the How to Apply Thermal Paste guide.