How to remove the back cover of Lenovo B450 notebook

How to disassemble the back cover of Lenovo B450 notebook:

Remove the back cover screws first, and remove the back cover.

There is only one wire for this machine keyboard, and the back is glued with double-sided tape, so find a place where you can start and slowly open it.

After the keyboard is opened, there are still a few wires in the back, remove and classify them, confirm that all the screws are finished, and the dismantling board should be on.

After the C shell is removed, the silk on the motherboard is removed, and the wire on the motherboard will generally have a triangular arrow, so it will not be wrong, and the motherboard will be removed.

Then it's time to remove the screws on the motherboard that hold the CPU fan cooling rack in place, and remove the cooling rack and fan after removing the screws.

Generally, there are screws on the fan that can be opened, and then remove the screws on the fan, disassemble the fan, and remove the dust in the fan.

Clean the fan, replace it with new silicone, and add some lubricating oil.

Then just follow the steps of the reverse process when dismantling and put it back on.

Finally, it is time to call it a day and test the machine.

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Lenovo laptops can remove the back cover by removing the battery first, and then using a screwdriver to unscrew the screws on the back.

1. Turn to the back position of the notebook, first remove the battery of the notebook, the battery is buckled by two buckles, and the battery can be removed by opening the buckles.

2. Then unscrew all the screws on the back with a screwdriver.

3. After unscrewing, you can remove the back cover to see the internal structure of the computer, as shown in the figure below.

When using a laptop, we sometimes want to change some hardware, such as CPU, fan, etc., and then we need to disassemble the laptop.

How to remove the back cover of Lenovo notebook

The screws of the Lenovo notebook cannot be unscrewed in order to prevent loss, and the missing parts cannot be unscrewed, of which the top five cannot be unscrewed, only the bottom can be unscrewed (the circle can be unscrewed).

Twist the bottom screw, loosen the remaining five, and when you hear the dinging sound and don't go up anymore, don't push too hard.

The screws can be unscrewed by removing them from the bottom of the back cover. The first dismantling may be tighter and use a thinner slotted taper.

<> back cover so that everyone can see it clearly, I took it off, if you have any questions, you can ask me again.

Generally speaking, the screws can be opened by removing them, but there are still buckles inside, which require a little force. But some things will have a screw or two under some labels, which I haven't seen in laptops. There are also two screws at the top of the C side of a notebook before, which need to be checked.

If you confirm that there are no other screws, you might as well be bold and pry it along the back shell, if there are still screws, the feeling is different.

By the way, another important point is that what you remove is not necessarily the back shell, but also the C side with the keyboard, that is, some laptop screens are connected to the C side, and some are connected to the D side.

One thing I deeply realized was that when I thought about "making a miracle with great force" in my heart, every abnormality was very worrying. I've dismantled all my laptops and seen a lot, I hope I can help you.

Take out the battery on the back first, there are 3 very small screws where the battery is placed, and loosen these 3 screws first. This will allow you to flip over the keyboard pad on it. Loosen all the screws under the keyboard, including the screw in the middle under the Lenovo tab.

Then go back to the back, unscrew the other screws on the back cover, and slowly uncover the back cover. Note that there is a monitor connector on the side, because these interfaces extend into the left hole of the back cover, and the back cover is stuck together, you need to break it out with a little force to peel it off. Finally, when you open the back cover, you can see the memory card slot on the motherboard inside.

Then press the small buttons on both sides of the card slot, and the memory module will warp out.

1. Turn the laptop over and remove the battery. Unscrew all visible screws on the back cover. Because the bezel is stuck on it, you should use a flat-mouth screwdriver to pry the back cover open, and you can open it by prying it all around the baffle (pry it in the circle in the picture), do not use too much force in the whole process, and the screwdriver can not penetrate too deep into the baffle too much, otherwise it is easy to poke the hardware bad, as long as you are careful, it will be fine.

2. After opening, you can see that the position of the circle in the picture is the radiator, which can be removed and cleaned.

Hello! Your problem is not very difficult, I personally recommend that you go to the Internet to find a case diagram of the disassembly of your model, it is very simple, do not disassemble blindly, responsible for your difficulty in installing, these technology products are not as easy to disassemble as general electrical appliances, I wish you success!!

In fact, it is very simple, make sure that after removing the screws, you can directly buckle it open (note that there is a knock slot on it), or you can pry it off with something.

Lenovo B540 all-in-one machine according to the following steps to disassemble the back cover, after disassembly, you can see the memory slot on the motherboard, at this time replace and install new memory.

1) First of all, take off the bracket (pay attention to using the index finger), as shown in Figure 2 below) Pull the back cover to the left and right respectively, separate the two back covers, and after the shell is disassembled, you can see the silver plastic bracket.

3) Disassemble the 8 screws around the plastic bracket.

4) After removing the optical drive, lift up to remove the plastic bracket.

5) At this time, you can see the motherboard, and the location of the memory slot is marked as shown in the figure below.

Remove the outermost bracket, unscrew the screws, and then you will see the port for adding memory, and the memory is for a notebook.

Dear Lenovo users:

Hello, it is not recommended that you solve it by yourself, if the computer is damaged because of this, it is not covered by the warranty, please forgive me. Have a great day!

Dear Lenovo users, hello!

Dear Lenovo users, hello!

It is recommended that you take it to a service station and the staff will help you install it.

If you want to clean this machine, you have to remove the motherboard of the computer, which is a bit troublesome. Here's a rough walk to you:

1.Put the battery down first.

2.Put the optical drive, wireless network card, hard disk down.

3.Lower all the screws under the main unit, pay attention to the position of the screws, there is a screw in the upper right corner of the computer that seems to be longer than the screws in other places (I want to have three different screws in total). There is a screw near the screw that fixes the optical drive to fix the keyboard, and if this screw is not lowered, the keyboard cannot be removed.

4.To remove the keyboard cover: Flip the computer 90 degrees so that the back of the screen is facing you.

At the edge of the battery installation, that is, the link between the keyboard cover and the main unit, you can cut the keyboard cover with a strong fingernail. Then lay your computer flat and turn the screen on, and you can remove the keyboard cover.

6.Remove the screen module: Before removing the screws, connect the screen first, and disconnect the wireless network card antenna from the motherboard.

The excuse for the screen connection is that the pins are linked, and you must be careful not to disassemble and assemble the pins crookedly, otherwise you can only replace the motherboard) There should be 7 screws under the keyboard cover (I don't remember it clearly) There are three relatively small screws in the top row. There should be two screws on each side of the two screen shafts, and the screws should be of different lengths, so remember the location clearly.

7.Remove the upper cover of the main unit: Finally, confirm whether the screws on the top and bottom have been lowered. After that, you can use something like a bank card or a fingernail in the gap of the link, and you can make a circle in the gap and the upper cover should be removed.

8.Disassemble the motherboard: There should be a screw on the motherboard to fix the motherboard, I can't remember the location, generally there will be a triangle symbol to fix the position of the motherboard screws to prompt you, after the screw is down, the motherboard can be taken down.

9.Remove the heatsink: Turn over the motherboard, remove the screws on the heatsink, and remove the heatsink after the cable is removed.

Note: Be sure to pay attention to the heat dissipation pad under the heat sink, do not get rid of this thing, if you don't have this thing, it may cause the computer to crash or lose power.

The above is the approximate disassembly process of B450, if you have no previous experience in disassembly, it is recommended not to disassemble and assemble, it is best to go to Lenovo after-sales service center to deal with it.

Installation Method:

1. Shut down and disconnect the power cable and network cable;

2. Close the notebook and flip it to the bottom of the notebook;

3. Remove the battery;

4. Remove the palm rest of the notebook;

5. Find the grooves on both sides of the memory;

Note: To prevent damage to the memory, do not touch the bottom edge of the memory;

6. Insert the memory into the memory slot (1) along an angle of about 20 degrees, and then force down (2);

7. Press down on the memory until you hear the click of the memory in place;

8. Ensure that the memory is correctly put into the slot and will not be easily moved;

9. Reset the palm rest of the notebook;

Note: Do not power on the laptop before resetting the palm rest;

10. Reset the battery, reconnect the network cable and power cable, and turn it on.

There are 3 screws on the side and one in the middle of the screw, and you can see the memory module when you get it out, and you can press down the cards on both sides of the memory module, and the memory module will pop out, and then change it.

Open the place where the ** is drawn on it and you can see the memory module. See if you want to add a memory module or change the memory jump? Lenovo computers are more picky about memory modules, and the brand is not right, it will be a blue screen, you pay attention!