Has your laptop stopped turning on, is the keyboard unresponsive, or is the screen covered in strange stripes? Don’t rush to take your equipment to a service center - many faults can be fixed on your own if you have a minimum set of tools and clear instructions on hand. In this article we will look at 10 most common breakdownsissues faced by laptop owners Lenovo, HP, Asus, Dell and other brands, and we’ll show you how to fix them without special skills.

It is important to understand: not every problem requires disassembling the device. Sometimes it is enough to clean the system from dust, update drivers or reset BIOS settings. However, there are also more serious cases - for example, Replacing thermal paste on the GPU NVIDIA or AMD can extend the life of a laptop by 2-3 years if done correctly and in a timely manner. We will describe each stage in detail, indicate the necessary tools and warn about typical mistakes that can lead to aggravation of the breakdown.

1. The laptop does not turn on: diagnostics and first steps

If nothing happens when you press the power button—no sounds, no display, no fan noise—the problem may lie in three things: the power supply, the battery, or the motherboard. Start with the simplest:

  • 🔌 Check the outlet and power cable. Connect the charger to another laptop or phone (if it supports USB-C PD). If the indicator on the power supply does not light up, the problem lies with it.
  • 🔋 Remove the battery (if possible without disassembling) and try to turn on the laptop from the network. If it works, the battery is faulty.
  • 💻Hold the power button for 30-60 seconds. Sometimes this resets the residual charge in the capacitors and revives the device.

If the laptop responds to the power button (indicators light up, fan sound is heard, but the screen remains black), the reason may be RAM or video card. Try:

  1. Unplug the laptop and remove the battery.
  2. Remove the back cover (usually it is secured with 5–10 screws).
  3. Carefully remove the slats RAM (press the latches on the sides) and clean the contacts with an eraser or alcohol. Put it back.
  4. If you have a discrete video card (for example, NVIDIA GTX or AMD Radeon), check her contacts.
⚠️ Warning: Do not touch the motherboard components with bare hands - static electricity can damage the chips. Use an antistatic wrist strap or regularly touch a grounded metal object.
📊 What laptop model do you have?
  • Lenovo (ThinkPad, IdeaPad)
  • HP (Pavilion, Omen)
  • Asus (ROG, ZenBook)
  • Dell (XPS, Inspiron)
  • Acer (Swift, Predator)
  • Other

2. The laptop overheats and turns off: cleaning and replacing thermal paste

Overheating is one of the main causes of sudden shutdowns and decreased performance. If the laptop gets hot 90–100°C under load (check in the program HWMonitor or Core Temp), urgent cleaning and replacement of thermal paste is necessary. Here's what you'll need:

  • 🔧 Screwdriver (usually Phillips #0 or #1).
  • 🧴 Thermal paste (Arctic MX-6, Noctua NT-H2 or analogues).
  • 🖌️ Plastic card or mediator for removing the cover.
  • 🌬️ A can of compressed air or a brush.

Algorithm of actions:

  1. Turn off the laptop, remove the battery, and remove the back cover.
  2. Disconnect the cooler (usually it is secured with 3-4 screws). Clean the blades and radiator from dust.
  3. Remove the heatsink from the processor and video card chip. Remove old thermal paste with a cloth soaked in isopropyl alcohol.
  4. Apply a thin layer of new thermal paste (about the size of a grain of rice for CPU and a little more for GPU).
  5. Reassemble everything in reverse order, making sure that the cooler is connected to the connector on the motherboard.
Symptom Probable Cause Solution
The laptop turns off 5–10 minutes after turning it on Overheating CPU or GPU Cleaning + replacing thermal paste
Loud fan noise even when idle Dust in the cooler or dried out thermal paste Cleaning + lubrication of the fan bearing
Artifacts on the screen under load (games, rendering) Video card overheating Replacing thermal paste with GPU + checking thermal pads
⚠️ Attention: On laptops Apple MacBook (especially models 2016–2020) thermal paste is often soldered to the heatsink. Don't try to scrape it off - use thermal interface remover (ArctiClean).

Unplug the laptop and remove the battery|

Take a photo of the location of the screws and connectors|

Prepare your work area (clean surface, good lighting)|

Use an antistatic wrist strap or periodically ground yourself

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3. The keyboard does not work: repair and replacement

If the keyboard does not respond to pressing or some buttons “stick”, the problem may be contamination, damage to the cable, or a malfunction of the controller. Start with diagnostics:

  • 🖥️ Connect an external keyboard via USB or Bluetooth. If it works, the problem is in the keyboard itself.
  • 🔍 Check if liquid has gotten under the buttons (signs: sticky keys, corrosion on contacts).
  • 🔧 Carefully pry the problematic key with a plastic card and clean the mechanism from dust or debris.

If the keyboard is completely dead, you will have to replace it. To do this:

  1. Buy a compatible keyboard (indicate your exact laptop model, e.g. Lenovo ThinkPad T480).
  2. Remove the top panel (on some models it is secured with latches, on others with screws under the rubber feet).
  3. Disconnect the keyboard cable from the motherboard (gently pull the plastic retainer).
  4. Install a new keyboard and reassemble the laptop.

On laptops HP Pavilion And Acer Aspire The keyboard is often secured with latches without screws. To remove it, you will need a plastic pick and patience - take your time so as not to break the latches.

How to clean the keyboard from liquid?

If water or a sweet drink is spilled on the keyboard:

1. Immediately turn off the laptop and remove the battery.

2. Turn the device over with the keyboard facing down and allow the liquid to drain.

3. Dry for 24–48 hours in a warm, dry place (you can use a fan at minimum speed).

4. After drying, clean the contacts with alcohol (90%+).

❌ Do not use a hair dryer - hot air can deform the plastic!

4. The laptop does not see Wi-Fi or Bluetooth: solving problems with the module

If your laptop stops connecting to wireless networks, it could be the culprit. Wi-Fi module, drivers or antennas. First check your software settings:

  • 📶 Make sure that Wi-Fi not disabled by a hardware button (on some models Lenovo And Asus there is a separate switch).
  • 🔄 Reboot your router and laptop.
  • 🖥️ Update drivers via Device Manager (section Network adapters).

If the network adapter is not detected by the system (Unknown Device in the manager), the problem is in the module itself. To replace it:

  1. Remove the back cover of the laptop.
  2. Find Wi-Fi module (usually it is under a black or silver metal cover, connected to two antennas).
  3. Disconnect the antennas (gently pull the connectors) and remove the module from the slot M.2 or mini-PCIe.
  4. Install a new module (for example, Intel AX200 or Qualcomm Atheros QCA61x4) and connect the antennas.
⚠️ Attention: On laptops Dell XPS 13/15 The Wi-Fi module is often soldered to the motherboard. In this case, repairs are possible only at a service center.
netsh winsock reset

netsh int ip reset


ipconfig /flushdns

After rebooting, the problem should disappear.

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5. The laptop screen does not work: diagnostics of the matrix and cable

If the screen remains black but the laptop turns on (you can hear the Windows boot sound), the problem may be matrix, plume or backlight inverter. For diagnostics:

  • 🖥️ Connect an external monitor via HDMI or DisplayPort. If there is an image, the matrix or cable is to blame.
  • 🔦 Shine a flashlight on the screen at an angle. If the image is barely visible, the backlight is broken.
  • 🔧 Gently press the screen frame in different places. If the image appears, the problem is in the cable.

To replace a cable or matrix:

  1. Remove the screen frame (it is secured with latches or double-sided tape). Use a plastic pick.
  2. Unscrew the screws holding the matrix and disconnect the cables (usually there are 2 of them: video and backlight).
  3. Install a new die (make sure the model is compatible, e.g. LP156WF6-SPK1 for Lenovo Legion Y540).
  4. Connect the cables and assemble the screen.

On laptops Apple MacBook Pro (2016–2020) matrix and cable are often soldered to Touch Bar. In this case, repairs will be expensive, and it is better to contact a service center.

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If the screen is cracked, but there is an image, you can temporarily use it by sticking transparent tape over the crack. However, this is not safe: the fragments can damage your eyes or hands.

6. Laptop slows down: optimization and upgrade

Slow operation can be caused by both software (viruses, disk fragmentation) and hardware problems (lack of RAM, worn out HDD). Start with simple steps:

  • 🛡️ Check your system for viruses (Malwarebytes or Kaspersky Virus Removal Tool).
  • 🧹 Clean your disk from debris (Win + R → cleanmgr).
  • 🔄 Update your drivers (especially for your video card and chipset).
  • 🖥️ Replace HDD on SSD (For example, Samsung 870 EVO or Crucial MX500).

If your laptop is running out of breath when playing games or working with graphics, add more RAM. To do this:

  1. Find out the maximum volume RAM for your model (on the manufacturer's website or through Crucial System Scanner).
  2. Buy compatible strips (eg. DDR4-3200 for Asus ROG Strix).
  3. Install them in free slots (if there are no slots, replace the old strips with more capacious ones).
Symptom Reason Solution
Windows takes a long time to load (5+ minutes) Fragmented HDD or low disk space Defragmentation or replacement with SSD
Laptop freezes when opening browser Shortage RAM (less than 8 GB) Add RAM
Games are slow even on minimum settings Overheating GPU or weak processor Cleaning + thermal paste replacement or upgrade

7. The touchpad does not work: setup and replacement

If the touchpad does not respond to touches, first check:

  • 🔧 Is it enabled in Windows settings (Settings → Devices → Touchpad).
  • 🔄 Reboot your laptop - sometimes the driver freezes.
  • 🖥️ Update the driver via Device Manager (section Mice and other pointing devices).

If the touchpad is physically damaged (cracked, does not respond to presses), it can be replaced:

  1. Buy a compatible touchpad (specify your laptop model, e.g. HP Pavilion 15).
  2. Remove the top panel of the laptop (usually it is secured with latches and 1-2 screws under the battery).
  3. Disconnect the touchpad cable from the motherboard and remove it.
  4. Install the new touchpad and connect the cable.

On laptops Dell XPS And MacBook The touchpad is often integrated into the top panel. In this case, replacement will be expensive, and it is easier to use an external mouse.

8. Laptop won’t charge: connector and battery repair

If the laptop only works on mains power and the battery does not charge, the problem may be:

  • 🔌 Power connector (contacts are loose or oxidized).
  • 🔋 Battery (resource exhausted).
  • 💻 Charging controller on the motherboard.

For diagnostics:

  1. Check if the battery is recognized in the BIOS (F2 or Del when loading). If not, the problem is in the battery or cable.
  2. Measure the voltage at the battery terminals with a multimeter (should be 10–12 V for Li-ion).
  3. If the power connector is loose, it can be soldered (a soldering iron and experience with microelectronics are required).
⚠️ Attention: Batteries Li-pol (for example, in MacBook Pro) are explosive if not handled correctly. Do not disassemble them or subject them to mechanical stress!
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If the laptop charges only in a certain position of the cable, the problem is in the connector DC-IN. Temporary solution: Gently bend the pins inside the connector (use a toothpick).

FAQ: Frequently asked questions about laptop repair

Is it possible to repair a laptop without experience?

Yes, many malfunctions (cleaning dust, replacing RAM or SSD, Windows recovery) do not require special skills. However, to replace the matrix, solder connectors or repair the motherboard, it is better to contact a specialist.

How much does a DIY repair cost?

The cost depends on the breakdown:

  • Replacing thermal paste: 300–800 ₽ (on your own) vs 1500–3000 ₽ in the service.
  • Keyboard replacement: 1000–3000 ₽ (depending on model).
  • Replacing the matrix: 5000–15000 ₽ (screens for MacBook more expensive).

How often should you clean your laptop from dust?

It is recommended to clean your laptop every 6–12 months, if it is used in a dusty room - once every 3–6 months. Gaming laptops (MSI, Asus ROG) require more frequent cleaning due to high temperatures.

What to do if the laptop falls and does not turn on?

First check:

  1. Integrity of the case and screen.
  2. Connect the charger - the power connector may have come loose due to the impact.
  3. If the laptop does not respond, remove the back cover and check if the battery is disconnected or RAM.

If after this the laptop does not turn on, the motherboard is likely damaged (diagnostics at a service center is required).

Can I use a laptop without a battery?

Yes, most laptops run on mains power without a battery. However:

  • ✅ Pros: no risk of battery bloating, less weight.
  • ❌ Cons: if there is a power outage, data may be lost; some laptops (Lenovo Yoga) refuse to turn on without a battery.