Lenovo Laptop

Lenovo Yoga 900 Disassembly

In this guide, I will explain how to disassemble the Lenovo Yoga 900 to remove the bottom cover, SSD, cooling fan, heat sink, speaker, and motherboard. Refer to this guide.

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Remove the ten screws securing the bottom cover.
Remove the ten screws securing the bottom cover

After unscrewing the fixing screws, insert a metal pry bar. Carefully pry up the clips. This step especially needs patience. Please do not damage the clips.
Separate the bottom cover

Once the bottom cover is removed, you can access the battery, SSD, wireless card, heat sink, cooling fan, and motherboard.
Lenovo Yoga 900 internal structure

Before continuing the disassembly, the first priority is to disconnect the battery power cable to prevent short circuits and other potential accidents that may occur during the disassembly process. This is a necessary step that must be taken before disassembling any electronic devices.
Disconnect the battery power cable

Remove the five screws securing the battery. The battery can be removed.
Lenovo Yoga 900 battery

The Lenovo Yoga 900 comes with a 66Wh, 8820mAh Li-ion battery. The Lenovo part number is L14L4P24.
L14L4P24

Lenovo Yoga 900 battery

Under the battery, you can access the touchpad.
Disconnect the touchpad cable from the motherboard and remove the six screws to remove the touchpad.
Close-up of the Lenovo Yoga 900 after removing the battery

Remove the touchpad

Lenovo Yoga 900 touchpad

The touchpad features a Synaptics touch chip.
Synaptics touch chip

Remove the four screws securing the speaker modules (left and right).
Remove the four screws securing the speaker modules

Disconnect the speaker cable from the motherboard.
Disconnect the speaker cable

This Lenovo Yoga 900 features a JBL speaker audio module.
Lenovo Yoga 900 JBL speaker

Remove the screw securing the SSD and carefully remove it from its slot.
This Lenovo Yoga 900 features a Samsung PM871 512GB SSD. Since this laptop has only one M.2 slot, if you need to upgrade the SSD, you will need to replace the existing SSD.
Lenovo Yoga 900 SSD

The part number of this SSD is MZNLN512HCJH-000L2, and the model is MZ-NLN5120 and PM871.
PM871

Lenovo Yoga 900 SSD

Remove the screw securing the wireless card and disconnect the two wireless antenna cables.
Remove the wireless card

The Intel Dual Band Wireless-AC 8260NGW wireless card supports 802.11ac, 2×2 Wi-Fi, and Bluetooth 4.2. The  Lenovo part number is 00JT481.
00JT481

Disconnect the deputy board cable from the motherboard, then unscrew the two screws and remove the deputy board.
Remove the USB board

Purple: Realtek sound chip
Lenovo Yoga 900 USB board

Red: Power LED light.
Orange: Power button.
Yellow: A key recovery button.
Green: Screen rotation lock button.
Lenovo Yoga 900 USB board

Remove the USB board.
The board features a card reader port, a USB Type-C port, and a USB 3.0 port.
Remove the USB board

Red: TPS65982 USB Type-C power chip.
Orange: Paradetech PS8740. It makes USB Type-C support DisplayPort signal transmission.
Yellow: 620FJ1LN (presumably reader control chip).
Blue: Winbond 25X40CL, Winbond BIOS chip.
Lenovo Yoga 900 USB board

Disconnect the LCD cable from the motherboard.
Disconnect the LCD cable

Disconnect the keyboard cable, backlit cable, and touchpad cable.
Remove the six screws securing the motherboard.
Disconnect the keyboard cable

Lift the motherboard from one side with your hand and wiggle it until it separates from the laptop.
Remove the motherboard

Disconnect the cooling fan cable and remove the three screws securing the heat sink.
Lenovo Yoga 900’s heat sink and fan assembly can be removed.
Remove the CPU fan

Remove the heat sink

SUNON 2.25W cooling fan
Lenovo Yoga 900 cooling system

Lenovo Yoga 900 cooling system

CPU fan

The cooling fan is made of aluminum alloy. The more blades it has, the greater the airflow it generates, thereby enhancing heat dissipation efficiency.

Cyan: 16GB onboard RAM
Blue: Intel Core i7-6500U processor
Yellow: Intersil ISL95857HRTZ Power Management Chip
Red: unknown, presumably a Lenovo customized power management chip
Lenovo Yoga 900 motherboard

We did not find the Southbridge chipset on the motherboard. To find relevant information, it was discovered that this generation of Skylake U-series low-voltage processor chipsets will be integrated into the processor, which helps reduce the size of the motherboard.
Lenovo Yoga 900 motherboard

Remove all screws securing the LCD hinges.
Remove all screws securing the LCD hinges

Now, the display assembly can be removed.
Remove the display assembly

LCD hinge

Close-up of the Lenovo Yoga 900 palm rest (including keyboard). At this step, you can replace the keyboard by simply removing the screws that secure it in place.
Lenovo Yoga 900 palm rest

Lenovo Yoga 4 Pro (Yoga 900) internal parts
Lenovo Yoga 900 internal parts

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23 Comments

          1. I have the same question as Eugene. There are virtually no bezels hiding the screws for the 900’s display. How do you separate the digitizer from the display case?

          2. I suspect it’s glued. One might need a hot air gun to melt the glue. This one is going to be very hard to replace. Lenovo charges over $600 for this screen replacement.

      1. Thanks for the fast response. Would you say it was somewhat easy to disassemble the computer? I’m comfortable upgrading my computer’s hard drives, RAM, etc. However, I have never disassembled my computer this much. It seems like it’s just a lot of screws to keep track of. Can you comment on this?

      2. Where can one buy a replacement keyboard for the Yoga 900? I’ve googled around quite a bit, and I can’t seem to find one. Thanks!

  1. I am considering taking the back off to check for any signs of damage to the USB internals. Last week, all of my USB ports suddenly quit working. I’ve tried every solution I can find, but nothing has worked. I’ve turned off the power-saving feature, checked the registry key, checked the BIOS for any USB settings, performed a system restore, and performed a clean reinstall of Windows 10 Pro. Nothing has worked. It won’t even light up when something is plugged in. So, considering everything, I think it is probably hardware-related. However, I don’t have the luxury of spending 30-45 days without a laptop since I use it for work.
    There are two things that give me pause about it being hardware-related. 1) The charging/USB 2.0 port will still charge the laptop, but it won’t read any USB devices plugged into it. 2) The MicroSD card slot still functions fine. From your pictures, it looks like it is on the same component as the USB-C Port and one of the USB 3.0 ports. So why would it still be working while the other ports are down?
    Any advice that anyone can offer would be greatly appreciated at this point. Thank you!

  2. The screen and digitizer need to be replaced as a single unit. They are inseparable without a high risk of breaking, which would be a huge expense.

    There is a service available online that allows you to mail your laptop for repair for under $400. The part itself costs over $300, so don’t bother and just send it for repair. If you send it for repair to Lenovo, they charge much more.

    1. Yes, separating the LCD from the digitizer would require some special equipment, which is not compatible with regular tools at all. It would be a waste to attempt. You need to buy the LCD/digitizer combo. If you buy anything on eBay for less than around $300, it is likely to be the LCD only. Be careful what you buy.

      1. Thanks, Eugene. The reason I asked is that different sources name different materials. Thanks for your response.

  3. The USB ports stopped working, including the USB port to charge the laptop (Lenovo Yoga 900). I tried to back up as much as I could before the battery ran out, but now the battery is not charged. Can I externally charge the battery so I can troubleshoot the laptop?

  4. I have tried every screwdriver bit I have in my precision set, and none fit well enough to remove the 10 screws on the back of the laptop. Can you please tell me what you used? Thanks in advance!

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