What's under the laptop keyboard: secrets of the internal structure

Have you ever wondered what's hidden under the plastic button panel on your laptop? For most users, the keyboard is just a tool for entering text, but in reality there is a a whole ecosystem of components, on which the performance, durability and even safety of the device depend. Understanding this design is useful not only for engineers, but also for ordinary users: it helps to understand the causes of overheating, evaluate upgrade opportunities, or troubleshoot problems on their own.

In this article we will take a detailed look at what elements are located under the keyboard of modern laptops - from motherboard And processor to cooling systems And battery. You'll learn how these components work, what functions they perform, and why access to them is often limited by manufacturers. And if you plan to disassemble the laptop yourself, we will give practical advice on how to do this without the risk of damaging the device.

1. Main components under the keyboard: overview

Under the laptop keyboard is heart of the device — a set of hardware modules, each of which is responsible for certain functions. In most models (eg Lenovo ThinkPad, Dell XPS or HP Pavilion) hidden under the top panel:

• 🖥️ Motherboard - main printed circuit board with processor, chipset and RAM slots.
• 🔋 Battery — lithium-ion or lithium-polymer battery (removable in some models).
• ❄️ Cooling system - radiators, heat pipes and fans for heat removal.
• 💾 Drives — SSD or HDD (in modern models, more often M.2 NVMe).
• 📡 Wi-Fi/Bluetooth module — a separate board or a soldered chip.
• 🔌 Ports and connectors — connection of display, USB, power, etc.

It is important to understand that the location of these elements can vary greatly depending on form factor laptop. For example, in ultrabooks (for example, MacBook Air or ASUS ZenBook) components are as compact as possible and are often soldered to the board, whereas in gaming laptops (for example, MSI GE76 or Acer Predator) the cooling system takes up a significant part of the space.

⚠️ Attention: In some models (for example, Apple MacBook Pro with Touch Bar), the keyboard is integrated into the top panel along with the battery. Trying to remove it without special tools may result in damage to cables or battery rupture.

2. Motherboard: the brain of the laptop

Motherboard (or mainboard) is the central hub that connects all the components of the laptop. It contains:

• 🧠 Central Processing Unit (CPU) - for example, Intel Core i7-12700H or AMD Ryzen 9 6900HX.
• 🖼️ Chipset — controls the interaction of the CPU with other devices (for example, Intel HM670 or AMD B550).
• 🧩 RAM slots - in modern laptops most often DDR4 or DDR5 (soldered or removable).
• 🔌 Controllers - for USB, SATA, PCIe and other interfaces.

Unlike desktop PCs, laptop motherboards are highly miniaturized and often have unique connectors, which complicates the upgrade. For example, in MacBook Pro 2021 processor Apple M1 Pro soldered into the board, and in Dell Latitude 7420 Only RAM and SSD can be replaced.

Component	Typical location	Possibility of replacement
Processor (CPU)	Under the heatsink, in the center of the board	Near the CPU (soldered or in a socket)
Random access memory (RAM)	On the sides of the processor	Depends on the model (soldered in or removable)
Chipset	Near or under the CPU	Cannot be replaced
BIOS/UEFI chip	In the corner of the board, often under the thermal pad	You can reflash, but not replace

When disassembling a laptop Losing or mixing up even one screw can lead to unstable work or damage to printed tracks.

3. Cooling system: why does the laptop get hot?

One of the most common laptop problems is overheating, and the cooling system located directly under the keyboard is often to blame. In the standard configuration it includes:

• 🌀 Fan(s) — blows out hot air (in gaming laptops there can be 2-3 of them).
• 🔥 Radiator(s) - aluminum or copper plates for heat dissipation.
• 💧 Heat pipes — transfer heat from the processor/video card to the radiator.
• 🧴 Thermal paste/thermal pads — improve thermal conductivity between chips and heatsink.

In budget laptops (for example, Lenovo IdeaPad 3) is often used passive cooling (without fan), which leads to throttling (automatic performance reduction) under load. In game models (for example, ASUS ROG Strix) the cooling system can occupy up to 40% of the internal space and include liquid metal thermal paste for better heat dissipation.

⚠️ Attention: If you notice that the laptop has started make a lot of noise or switch off when under load, this may indicate Thermal paste has dried out or the fan is clogged with dust. In this case, cleaning or replacement of the heat-conducting material is required.

Unplug the laptop and remove the battery (if removable)

Prepare a Phillips screwdriver and a plastic spatula

Take photos of the screw locations before disassembling.

Use a can of compressed air or a soft brush

Apply new thermal paste (for example, Arctic MX-6) to the CPU/GPU-->

4. Battery: removable or soldered?

The battery is one of the most vulnerable components of a laptop, and its placement under the keyboard is no coincidence: it helps balance the weight of the device and optimize heat distribution. Modern laptops use two types of batteries:

1. Removable - found in business models (for example, Lenovo ThinkPad T14 or Dell Latitude). They can be easily removed by releasing 1-2 latches.
2. Soldered - typical for ultrabooks (for example, MacBook Air or HP Spectre). Replacement requires soldering equipment and skills.

Average lithium-ion battery life: 300-500 charging cycles (about 2-3 years with intensive use). After this, the capacity begins to drop rapidly, and the laptop may turn off even at 30-40% charge. Check the battery condition in Windows you can use the command:

powercfg /batteryreport

This will generate a report battery-report.html in the user folder with detailed information about charging cycles and current capacity.

How to extend battery life?

Avoid full discharge (optimally keep the charge between 20% and 80%).

Do not leave the laptop connected to the network for a long time (especially at high temperatures).

Use original chargers - cheap analogues can damage the power controller.

Store the laptop with a charge of ~50% during long periods of inactivity (for example, in a warehouse).

5. Storage: SSD vs HDD under the keyboard

Under the laptop keyboard is almost always located main storage - or traditional HDD (in old or budget models), or modern SSD. Recently, two SSD form factors have predominated:

• 📏 2.5" SATA — installed in the HDD bay (for example, in Dell Inspiron 15).
• 🔌 M.2 NVMe - compact module, inserted into a slot on the motherboard (for example, in ASUS Vivobook).

Read/write speed NVMe SSD (For example, Samsung 980 Pro) can reach 7000 MB/s, whereas SATA SSD (For example, Crucial MX500) — maximum 550 MB/s. This greatly affects the speed of system loading and application launching.

Drive type	Speed (read/write)	Capacity	Cost per 1 TB
HDD (2.5")	80-160 MB/s	500 GB - 4 TB	$25-$40
SATA SSD (2.5")	500-550 MB/s	250 GB - 4 TB	$80-$120
NVMe SSD (M.2)	3000-7000 MB/s	250 GB - 8 TB	$100-$200

When upgrading a drive, it is important to consider protocol support. For example, slot M.2 can only work with SATA SSD (as in Lenovo V15) or support PCIe 4.0 x4 (as in MSI GS66 Stealth). You can clarify this in the model specifications or using the utility HWiNFO.

6. Wi-Fi and Bluetooth: where are the communication modules hidden?

Wireless communication modules (Wi-Fi And Bluetooth) in laptops are usually a separate small board that is attached to the motherboard via a connector M.2 2230 or NGFF. In most cases it is located:

• 📶 Near the antenna wires (usually the black and white cables going to the screen).
• 🔄 Under a metal cover (in models with support Wi-Fi 6E, for example, Intel AX210).
• 🔌 In a separate slot (sometimes combined with an SSD, as in some ASUS).

Modern modules (for example, Qualcomm FastConnect 6800 or Intel Wi-Fi 6 AX201) support speeds up to 2.4 Gbps and standard Bluetooth 5.2. However, in budget laptops (for example, Acer Aspire 3) may be outdated Wi-Fi 5 (802.11ac), which limits the Internet speed.

⚠️ Attention: When replacing a Wi-Fi module, make sure that the new one is supported by your laptop model. For example, in MacBook Pro cannot be installed before 2018 Wi-Fi 6 due to level restrictions macOS.

7. Disassembling a laptop: step-by-step instructions

If you decide to disassemble the laptop yourself (for example, for cleaning or upgrading), follow this algorithm. Remember: Each laptop is unique and should be found before disassembling service manual for your model (for example, on the website iFixit).

Turn off the laptop and unplug the power cable

Remove the battery (if it is removable)

Prepare an antistatic wrist strap or regularly touch a grounded object

Take photos of each disassembly step (especially screw locations)

Use plastic spatulas to avoid damaging the latches -->

General procedure:

1. Removing the bottom cover. On most laptops it is secured with screws (often under the rubber feet). B MacBook will be required Pentalobe P5 screwdriver
2. Disconnecting the battery. If the battery is soldered, first disconnect its cable from the motherboard (in Lenovo this is often a connector JST PH 2.0).
3. Removing the keyboard. It can be secured with latches or screws. B HP EliteBook the keyboard is often glued, and to remove it you need sucker.
4. Access to components. Now you can see the motherboard, cooling system and drives. Be careful with trains — they are easy to damage!

After completing the work, reassemble the laptop in reverse order. If it does not turn on after assembly, check:

• 🔌 Connecting the battery and power.
• 🔧 Tightening the screws (but do not overtighten!).
• 🖥️ Connecting the keyboard and display cable.

FAQ: Frequently asked questions about the insides of a laptop

Is it possible to replace the processor in a laptop?

Most modern laptops have a processor soldered into the motherboard (for example, in Apple M1/M2 or Intel 12th generation in ultrabooks). Replacement is only possible on models with a socket (for example, some Clevo or MSI for gamers), but requires socket compatibility (LGA 1200, BGA 1744 etc.) and chipset.

How can you tell if the thermal paste has dried out?

Signs of thermal paste drying out:

• Laptop overheats even under low load (CPU temperature is higher 90°C).
• Fan runs at maximum speed constantly.
• Performance falls due to throttling (checked in HWMonitor or ThrottleStop).

Solution: disassemble the laptop, clean the old paste with isopropyl alcohol and apply a new one (for example, Noctua NT-H2).

What should I do if the keyboard does not work after disassembling?

Probable reasons:

• 🔌 Keyboard cable not connected or damaged (check the connector on the motherboard).
• 🔧 Screws overtightened - this may deform the board (loosen them).
• 🖥️ Driver conflict after connection (reinstall the keyboard driver in Device Manager).

If the keyboard still doesn't work, try connecting an external one via USB - this will help diagnose the problem.

Is it possible to install two SSDs in a laptop?

Yes, if the laptop has:

• Two slots M.2 (for example, in ASUS ROG Zephyrus G14).
• Slot M.2 + compartment for 2.5" SATA (for example, in Lenovo Legion 5).

Please note RAID support (in some models, two SSDs can be combined into an array for increased speed).

Why do some laptops have no access to components under the keyboard?

Manufacturers (especially Apple And Microsoft) often solder components and use glue for attaching the battery and keyboard. These are:

• 📦 Reduces the thickness of the device.
• 🔒 Increases the complexity of self-repair (which is beneficial for service centers).
• 💰 Reduces cost (fewer connectors = cheaper production).

These laptops are more difficult to maintain, but they are usually thinner and lighter.