Full analysis: how to remove the back cover and disassemble the Lenovo B570e laptop

Owners of laptop series Lenovo IdeaPad B570e often face the need for preventive maintenance or replacement of outdated components. Over time, the cooling system becomes clogged with dust, which leads to overheating of the processor and reduced performance, as well as the appearance of extraneous noise. To solve these problems, high-quality access to internal components is required, which is impossible without proper disassembly of the case.

The process of removing the cover on this model has its own specific features that distinguish it from other devices in the line. Incorrect actions can lead to broken plastic latches or damage to the keyboard backlight cables. In this article, we'll go through each step in detail so you can safely service your laptop.

Preparing the workplace and necessary tools

Before starting any manipulations with the device, ensure safe working conditions. You'll need a clean, level surface with good lighting to avoid losing small screws. Unplug your laptop and remove the battery, even if you plan to do so later.

The tools must be prepared in advance so that the process is not interrupted. The basic set includes a Phillips screwdriver with a PH1 or PH2 bit, a plastic card or pick for prying the latches, and tweezers for removing small parts. An antistatic wrist strap is desirable, but not required if you periodically touch grounded metal objects.

It is important to check the condition of the screws themselves on the case, as some of them may be hidden under stickers or rubber feet. If you use a magnetic mat to sort screws, make sure they don't get caught by the magnets too close to the hard drive. This will prevent the risk of data corruption on the drive.

• 🔧 Phillips screwdriver PH1 or PH2 with magnetic tip
• 🪜 Plastic card or mediator for opening latches
• 🧤 Antiseptic wipe for cleaning hands from dust
• 📸 Smartphone for photographing the disassembly process

⚠️ Warning: Never use metal tools to pry the cover, as this is almost guaranteed to cause deep scratches to the case and possible short-circuiting of internal components.

Removing the back cover and disconnecting the battery

The first step in the disassembly procedure is to remove the screws securing the bottom panel. On the model Lenovo B570e their number may vary depending on the revision of the motherboard, but usually there are about ten screws of different sizes. Please note that some screws may be hidden under rubber pads that need to be carefully pryed off.

After removing all fasteners, you must remove the cover. This should be done slowly and evenly, passing around the perimeter of the case with a plastic tool. You will hear characteristic clicks indicating the release of the latches. Do not apply excessive force in one place, otherwise the plastic may crack.

Once the cover is removed, the first thing to do is disconnect the battery cable from the motherboard. This is a critical stage to ensure the safety of further work. Even if the battery is removed from the case, a residual charge may remain and an accidental short circuit may cause damage. motherboard.

• 🔋 Disconnect the battery cable CN-1 before any other actions
• 🔍 Check for screws under the serial number stickers
• 🛡️ Use a plastic card to separate the case

⚠️ Attention: If the battery cable is glued to the case, do not try to tear it off with a sharp movement. Carefully pry off the connector so as not to damage the contacts on the board.

Access to RAM and hard drive module

After removing the cover, access to the main upgrade components opens. The RAM module is located in a special compartment and is fixed with metal clips on the sides. To remove the bar, you need to carefully move the clamps apart, after which the module itself will rise at an angle.

The hard drive in this model is secured by a metal frame with four screws. Before removing the screws, make sure that you do not damage the SATA cable that connects the drive to the board. You need to remove the disk smoothly by pulling the special plastic tab or the case if the tab is missing.

If you are planning to replace the HDD with an SSD, it is important to rearrange the frame correctly or use an adapter. Differences in drive thickness may cause the new drive to wobble in the bay. Check compatibility before purchasing a new component to avoid installation problems.

• 💾 Remove the memory stick by spreading the side clamps
• 💿 Unscrew the four screws securing the hard drive
• 🔌 Disconnect the SATA cable carefully, without distortion

Removing the Keyboard and Accessing the System Board

For deeper maintenance, such as replacing processor thermal paste, you will need to remove the keyboard. It is attached to the top cover of the case using latches and a single screw, which is often hidden under a sticker or in the battery compartment. The screw is usually located at the center of the bottom of the keyboard.

After unscrewing the screw, you need to carefully pry the keyboard around the perimeter. Be extremely careful, as there is a thin cable of backlighting and key connections running underneath it. You need to disconnect the cable by lifting the connector latch, and not by pulling out the wire itself.

At this stage you have full access to the cooling system and radiator. The heatsink is attached to the processor with four screws, which must be unscrewed in a strictly defined sequence. Usually this is a cross-shaped pattern, indicated by arrows on the radiator or case itself. This is necessary to relieve pressure evenly.

• 🔑 Unscrew the keyboard securing screw (often hidden)
• 🔌 Disconnect the keyboard cable
• 🔧 Unscrew the radiator screws in order 1-3-2-4

What to do if the keyboard cannot be removed?

If the keyboard does not budge, check to see if you forgot to remove the screw under the sticker or in the battery compartment. Sometimes the latches stick due to dust, then you can carefully blow compressed air into the cracks before prying them off.

Replacing thermal paste and maintaining the cooling system

This is the most critical stage on which the cooling efficiency depends. Old thermal paste must be completely removed from the surface of the processor and video chip. Use isopropyl alcohol and a lint-free cloth to avoid leaving lint. Also thoroughly clean the surface of the radiator.

Applying new thermal paste must be done carefully. It is best to use the “pea” method in the center of the chip, since when installing the heatsink, the paste itself will be distributed evenly. Excess paste can leak outside the crystal and onto the contacts, leading to oxidation.

After applying the paste, install the radiator and tighten the screws crosswise. Do not over-tighten them as this may damage the processor die. Moderate force will ensure good contact without risk of destruction. Wipe any escaping thermal paste with alcohol.

⚠️ Attention: Never use a metal spatula to remove old thermal paste., as you may scratch the surface of the crystal, which will lead to microcracks and overheating in the future.

Assembling the device and checking its functionality

Reassembling the laptop occurs in the reverse order of disassembly. Start by installing the cooling system and keyboard, making sure all cables are connected all the way. Close the keyboard latches, pressing it around the perimeter until you hear a characteristic click.

Install the bottom cover and tighten all screws. Do not overtighten them to avoid stripping the threads in the plastic housing. Insert the battery and connect it to the motherboard. Only after this can you connect the power and turn on the device.

The first startup may take longer than usual as the system performs a self-test. Go into the BIOS to check the processor temperature when idle. If the indicators are normal, then the service was successful. Install the drivers and test the system under load.

• 🔩 Tighten the cover screws with moderate force
• 🔌 Connect the battery last
• 📊 Check the temperature in BIOS or monitoring utilities

Component	Recommended thermal paste	Screw tightening torque
Processor (CPU)	MX-4, MX-6	Moderate (all the way)
Graphics (GPU)	MX-4, MX-6	Moderate (all the way)
Housing (screws)	N/A	0.5-0.6 Nm
Radiator (screws)	N/A	0.4-0.5 Nm

Common mistakes during disassembly and ways to avoid them

Many users make common mistakes that can damage the device. The most common problem is using the wrong screwdrivers, which strip the screw slots. This makes further disassembly impossible without drilling or drilling out the screw.

Another common mistake is ignoring screw markings. Screws in laptops Lenovo They have different lengths, and if you screw a long screw into a short hole, you can pierce the motherboard. Always arrange the screws in a diagram or in the order in which they are removed.

It is also important to be mindful of static electricity. Working in woolen clothing or on carpet can create a discharge that can destroy memory chips or the processor. Touching the metal case before starting work will remove the charge, but it is better to use an antistatic wrist strap.

• ❌ Using flathead screwdrivers instead of Phillips screwdrivers
• ❌ Mixing screws of different lengths
• ❌ Work without removing static charge

What to do if the latch is broken?

If the plastic latch breaks, don't panic. You can temporarily fix the cover using double-sided tape or clamps, but in the future it is better to replace the body or find a specialized spare part.

How to properly disconnect the battery cable on Lenovo B570e?

The battery cable has a latch. To turn it off, you need to carefully lift this latch up (usually 1-2 mm) and only then pull out the cable. You cannot try to pull out the cable without lifting the latch - you will break the contacts.

Do I need to disconnect the CMOS battery before replacing thermal paste?

To replace thermal paste, it is not necessary to disconnect the CMOS battery (the round coin on the board), since you have already disconnected the main battery and de-energized the board. However, if you plan to reset the BIOS, you can disconnect it for 5 minutes.

Can I use regular alcohol to clean thermal paste?

It is advisable to use isopropyl alcohol (isopropanol) as it evaporates quickly and leaves no residue. Regular rubbing alcohol contains water, which can corrode the contacts if the board is not allowed to dry completely.

How to check that the fan is working after assembly?

Turn on the laptop and listen to the sound of the fan. You can also go to a monitoring utility (for example, AIDA64) and check the rotation speed in revolutions (RPM). If the speed is 0, the fan cable may be connected incorrectly.