Lenovo ThinkPad 25 Disassembly (SSD, RAM Upgrade Options)


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.
remove bottom cover

These two screws are used to fix the keyboard.
remove bottom cover

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

keyboard bezel

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.
remove keyboard

Disconnect the keyboard cable and TrackPoint cable.
remove keyboard

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

Lenovo ThinkPad 25 keyboard

Use the tool to pry the back cover slowly.
remove bottom cover

Take care to avoid getting these snaps broken.
remove bottom cover

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

Lenovo ThinkPad 25 bottom cover

With the bottom cover removed, you can get access to the internal battery, SSD, RAM, Wi-Fi card, cooling fan, heat sink and motherboard.
Lenovo ThinkPad 25 internal picture

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

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

Lenovo ThinkPad 25 cooling fan

Samsung 16GB DDR4 2400MHz RAM
The laptop has two RAM slots. If necessary, you can add another memory module.
Lenovo ThinkPad 25 RAM

Intel Dual Band Wireless-AC 8265NGW with BT4.2, Lenovo FRU: 01AX704
Lenovo ThinkPad 25 wireless card

Lenovo ThinkPad 25 wireless card

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 ThinkPad 25 SSD

Lenovo PCIe x4 NVMe 512GB M.2 SSD, P/N: SSS0L25090, FRU: 00UP471
Lenovo ThinkPad 25 SSD

Next, we want to remove the motherboard and speakers.
Lenovo ThinkPad 25 internal picture

Disconnect the following cables
1:LCD video cable, fingerprint cable
2:NFC cable
3:Switching power supply cable
remove the motherboard

Here’s Lenovo ThinkPad 25 motherboard.
Lenovo ThinkPad 25 motherboard

Lenovo ThinkPad 25 M.2 motherboard

Intel seventh-generation Core i7-7500U processor
Lenovo ThinkPad 25 processor

NVIDIA GeForce 940MX graphics card (2GB)
Lenovo ThinkPad 25 graphics card

Lenovo ThinkPad 25 palm rest
Lenovo ThinkPad 25 palm rest

Lenovo ThinkPad 25 palm rest

Press fingerprint module
Lenovo ThinkPad 25 fingerprint module

NFC module
Lenovo ThinkPad 25 NFC module

1:Touchpad cable
speaker module

Display assembly
Lenovo ThinkPad 25 Display assembly

remove screen

remove screen

IVO R140NWF5 R1, FRU:00NY421, 45% NTSC
Lenovo ThinkPad 25 screen
source: 51nb.com


  1. I just noticed on my ThinkPad 25 that there is a SIM card slot. Do you think this LTE data card from Lenovo will plug into the board somewhere? I tried to look at the connector beside the WLAN card, but I’m not sure. I don’t know why they would put a SIM card slot on the machine if it couldn’t be expanded, though. This is the LTE card I’m referring to: https://www3.lenovo.com/us/en/accessories-and-monitors/mobile-broadband/4g-lte/NET-BO-ThinkPad-EM7455-4G-LTE-WWAN/p/4XC0L59128

    • Zachary, it was supposed to come with a. Check the official Lenovo data sheet posted by the Lenovo employee Serene in the Lenovo ThinkPad forum. If you contact Lenovo they’ll send you the missing part but you may have to get past the first line of technical support (they tried to tell me it wasn’t in my model; nice try, we all know this one only has one model). Quite a few people ran into this.

      This page also omits disconnecting the internal battery via the BIOS. Make sure to do this if you want it to work when you put it together again!

  2. I purchased a thinkpad 25 with 512 ssd. I’m wondering if there is any room for an msata or additional drive on there? I have a 256GB SD card but it’s not reliable to run virtual machines off of for example…

  3. Firstly, thanks for the write up. I wish I had found it before I replaced by SSD and upgraded the ram on my T480. Do you have any recommendations on if the snap breaks from the chassis and the bottom cover? One of mine did and now when the cover is on and screwed in tightly there is a small, but noticeable, gap. It creaks sometimes when you press down on the trackpad. It’s not necessarily effecting the computer performance, it’s just frustrating to have something so expensive be broken.


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