Therefore, it would not be bad to know their structure and how to troubleshoot minor problems without turning to specialists. Although there are now so many “specialists” with dubious reputations that no matter where you look, there are only masters. But in the end we end up with a tablet with even bigger problems, or we pay an exorbitant price to fix a trivial problem.
It's no secret that many people don't even know how to remove the back cover of the tablet, if only to assess the condition of the battery.
This article will describe a method for disassembling and repairing one of the tablets, but the principle and tools used do not differ much from the same operation with other devices.
So, we have before us a tablet whose screen does not light up when it is turned on after falling, although it makes startup sounds and pressing keys.
Externally, the touchscreen and screen matrix have no cracks or smudges. Let's try to remove the back cover.
For this, craftsmen use a mediator - a triangular plastic tool with sharpened corners. If you don't have one, you can use an old bank card or a piece of plastic ruler with sharpened and rounded corners. The photo shows that just such a homemade tool is used.
If everything is done correctly, it will not leave a trace of your intervention on the tablet body.
Under no circumstances use a screwdriver or anything metal for this purpose. The consequences will be disastrous, ranging from nicks and broken latches to damage to the cable, matrix and other “internals” of the device.
So, place the tablet on a previously prepared clean and flat surface, screen down. The surface could be a glossy magazine placed on a desk.
If it has a decorative cover covering the slots with SIM cards and memory cards, you should open it and move it to the side.
As for the cards themselves, they need to be removed. Otherwise, either they or the slots for their installation will be broken.
Next, we take our prepared ruler and try to insert its sharpened edge into the gap between the lid and the top part.
This must be done carefully without pressing hard. We simply follow the connection from one side to the other.
In order not to damage anything inside the tablet, when the mediator passes inside, you should hold it with your fingers 1-2 mm from the parts to be separated. Thus, when removing the cover, the fingers will act as a limiter.
We carefully move our tool around the perimeter of the tablet, without making rocking movements. You will hear the latches coming out of the hook one after another.
When the pick has passed around the circle and you can see that the cover has come loose, carefully remove it.Sometimes to do this, you need to move it down a little.
We remove the lid, and all the beauty of our pet’s inner world appears before us.
Here you can see the battery, motherboard, cables, as well as other parts of the device.
The first thing you need to pay attention to is the battery. Does it have any swelling, leaks or other visible defects?
Next, disconnect the battery.
The fact is that after the fall one of the cables could have lost contact, so it is necessary to inspect them. It is strictly not recommended to do this with the battery connected.
Also, you should remember that static electricity on the human body can damage the electronics of the device, so at least periodically, before any actions with the board, touch the heating battery with your hand to remove the charge.
Most often, the battery is connected to a connector, so disconnecting it will not be difficult. Use a thin watch screwdriver or toothpick for this.
After the battery, disconnect the small plugs of the different sensors.
If they are nearby, it is better to take a photo of where and what happened.
Now the speaker plug.
Power, off and volume buttons.
Here pay attention to the connector itself. To pull out the cable, you first need to carefully lift the white part - this is the clip. When it is raised, the cable easily comes out of the connector.
It is when it falls that this part can either rise or break on one of the sides, then the contact of the cable disappears, which leads to various problems.
Therefore, sometimes it is enough to pull out the cable, insert it back and close the latch.
When the latch is raised, we pull out the cable using the same toothpick, namely its rounded shape.
Here is the photo of the screen cable. Basically it depends on it whether there is an image.
To get to the touchscreen cable, you will have to remove the speaker. It is secured with two screws.
We unscrew them.
We remove the speaker.
We move the protective tape to the side, which helps to see the sensor cable.
We release the latches and pull this tape. Two trains will come out with it.
If desired, you can wipe the metalized contacts of the cable with alcohol - this will slightly improve the contact.
Next, we do everything in reverse order. When inserting the cables into the connector, make sure that they go all the way in and only then lock them with a clamp.
Lastly, connect the battery.
Before putting the lid on, you need to check the operation of the tablet and only if everything is fine, close it. It's easy to do. Place the device on the same surface and apply the lid exactly around the perimeter. Then press evenly along the edge until you hear a characteristic click.
Very often, this repair procedure described above will return the tablet to its original working condition. This is certainly not a panacea, but it’s worth a try.
