In this guide, I will disassemble a Lenovo ThinkPad 25 Anniversary Edition laptop. I will remove the bottom cover in order to access the internal battery, RAM, SSD, Wi-Fi card, keyboard, touchpad, speaker, cooling fan, heat sink and motherboard.

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Unlock and remove the battery.

Remove six screws from the bottom cover.



These two screws are used to fix the keyboard.



Gently lift the keyboard bezel, and then disconnect the power button cable.



Slide the keyboard about 2-3 millimeters towards the display, so there is a gap between the bottom side of the keyboard and palm rest assembly.

Lift up the keyboard and lay down the keyboard on the palm rest.



Disconnect the keyboard cable and TrackPoint cable.



Here’s Lenovo ThinkPad 25 keyboard, Lenovo P/N: 01HW487



Use the tool to pry the back cover slowly.



Take care to avoid getting these snaps broken.



In the battery bay also has four buckles, you need to release one by one.



With the bottom cover removed, you can get access to the internal battery, SSD, RAM, Wi-Fi card, cooling fan, heat sink and motherboard.



Disconnect the batter connector and remove all screws securing the battery.



Internal battery FRU：01AV421, 11.4V, 2.1A, 24W manufacturer：Simplo Technology

External battery FRU：01AV490, 11.4V, 2.1A, 24W manufacturer：LG



Lenovo ThinkPad 25 heat sink and cooling fan module, Lenovo FRU: 01AX925



Samsung 16GB DDR4 2400MHz RAM

The laptop has two RAM slots. If necessary, you can add another memory module.



Intel Dual Band Wireless-AC 8265NGW with BT4.2, Lenovo FRU: 01AX704



Like the Thinkpad T470, the M.2 SSD is still mounted on the adapter and connected to the motherboard via the adapter, which undoubtedly degrades the performance of the SSD.



Lenovo PCIe x4 NVMe 512GB M.2 SSD, P/N: SSS0L25090, FRU: 00UP471



Next, we want to remove the motherboard and speakers.



Disconnect the following cables

1：LCD video cable, fingerprint cable

2：NFC cable

3：Switching power supply cable

4：Screws



Here’s Lenovo ThinkPad 25 motherboard.



Intel seventh-generation Core i7-7500U processor



NVIDIA GeForce 940MX graphics card (2GB)



Lenovo ThinkPad 25 palm rest



Press fingerprint module



NFC module



1：Touchpad cable

3：Touchpad

4：Speaker



Display assembly



IVO R140NWF5 R1, FRU：00NY421, 45% NTSC



source: 51nb.com