The phone went for repair, just repaired, got the black screen, the motherboard burned, what s going

The black screen of the mobile phone is one of the faults that are often encountered in the maintenance of mobile phones, and the black screen can be divided into two types: one is the black screen in use, and the other is the black screen in standby. Most of the black screens in use are caused by their own third-party software, and this situation rarely occurs with the machine.

It can also be subdivided into two kinds: one is that there is a problem with the software itself, the software itself is unstable, or it does not match the mobile phone system, etc., this is easy to solve, just uninstall it; The second is the conflict between the software and the software, which is a little more troublesome to solve, and requires a software to install and uninstall the software in the experiment. If you find it, uninstall it, and the problem will basically be solved.

It is recommended not to install too much useless chicken rib software. Although buying a smartphone is to play the machine. But some software that you don't use at all is a waste.

As for the black screen in standby, most of the straight board machines have a power-saving circuit design: the mobile phone will automatically turn off the screen if it can't detect the key trigger signal for a long time, that is, standby, when you need to use the mobile phone, a button will activate the power-saving circuit, and then the screen lights up! The reason for the black screen is often reflected by the delay of the screen triggering circuit.

That is to say, the mobile phone system has issued a command to light up the screen, but because the circuit is delayed, it is not sent successfully, and the screen is not lit successfully, but the mobile phone system thinks it has been lit, so it causes a black screen. The phone screen is black, don't be in a hurry to restore it first. Use a friend's mobile phone to call your own **, if you can get through, you can also answer normally.

That's basically the problem. There is no need to panic when a black screen appears, and there is no need to pick the battery immediately. You can leave the phone for about 3 minutes without pressing any keys on the phone, and then press the button again to activate the screen.

After many years of practice. It can generally be returned to normal immediately! In this way, it basically does not have a big impact on the use.

It is necessary to go for repairs.

1. The mobile phone is still under warranty, and the mobile phone is non-man-made damage, the official after-sales detection of the mobile phone is caused by the failure of the motherboard, in this case, we can go to the official after-sales maintenance point to replace the motherboard for free, and the performance failure of the mobile phone during the one-year warranty period can be repaired free of charge.

But we need to pay attention to the fact that the official after-sales maintenance point has problems with the repair is to replace the repair, if your mobile phone suddenly does not turn on, and the fault is a motherboard problem, the after-sales service will generally replace the entire motherboard for you, but replacing the entire motherboard means that the information in the mobile phone will all disappear.

2. The mobile phone is man-made damage, and the warranty period has expired, in this case, we have to look at the degree of damage to the mobile phone, if the mobile phone is only slightly water or rash, it can still be worth repairing, generally slight water or rash repair costs will not exceed one-third of the total price of the mobile phone.

3. The problem of sudden damage to the motherboard is generally that some capacitors of the motherboard are broken down or a chip is burned out, in this case, the maintenance cost of the motherboard will not be very expensive, and the service life of the mobile phone will not be affected after repair.

4. There is important information in the mobile phone, and it is worth repairing in this case.

5. The motherboard of the mobile phone belongs to the font damage, the water ingress of the mobile phone, the motherboard is seriously corroded, and the mobile phone is deformed by the heavy fall of the motherboard.

Symptoms of a broken phone motherboard

If the phone is damaged by the motherboard, then the phone may have the following symptoms:

The mobile phone suddenly does not turn on, the mobile phone does not restart from time to time, the mobile phone has no signal, the wifi cannot be turned on, the mobile phone has no sound, the mobile phone does not charge, the mobile phone does not display, the mobile phone is hot, the mobile phone consumes power quickly and other symptoms, the above symptoms are generally motherboard problems, and the maintenance needs a professional master to carry out.

Hello, it is recommended to clean the computer thoroughly and replace the motherboard battery.

The main factors that the mobile phone cannot be turned on are the battery, mobile phone software, and hardware that will cause the failure to turn on. We recommend that you do the following:

1. Replace a mobile phone battery of the same model for testing or send the battery to the nearest service center for testing (suitable for models with non-built-in batteries).

2. Charge with a wire charger for a period of time and try to turn it on.

3. Take out the SIM card and SD card at the same time, and then press the power button for more than 10 seconds to test whether it can be turned on.

If it still can't be turned on, there may be a problem with the system program or hardware, and it is recommended to send the phone to the nearest service center for testing.

There are many factors that the mobile phone cannot be turned on, and the battery, mobile phone software, and hardware will cause this kind of failure to turn on. We recommend trying the following:

1. Replace a mobile phone battery of the same model for testing or send the battery to the nearest service center for testing.

2. Take out the battery, clean the metal contacts of the battery with a rubber and test.

3. Take out the SIM card and SD card at the same time, and then press the power button for more than 10 seconds to test whether it can be turned on.

If it still can't be turned on, there may be a problem with the system program or hardware, it is recommended to send the phone to the nearest Samsung service center for testing.

It can be recovered, when the motherboard is damaged and the mobile phone is repaired, the original information can be read, but if the memory chip is also damaged, the original stored information can only be recovered with particularly professional equipment and programs.

Now the memory chip of the mobile phone is integrated on the motherboard, and the SD card will definitely be removed by itself before repair, and the integrated storage may also be replaced when changing the motherboard, so you must remember to explain it when repairing it to avoid information loss.

There are three main parts on the motherboard of the mobile phone:1. a baseband part.

Baseband chip and power management chip: responsible for coding.

2. Radio frequency part.

RF processor and RF power amplifier: responsible for sending signals out and receiving signals.

3. Other parts.

CPU memory for various controllers (touchscreen, Bluetooth, WiFi, sensors, etc.). There are also microphones, earpieces, speakers, cameras, interfaces for display screens, etc., all of which are soldered to a circuit board, and the whole board is called a mobile phone motherboard.

Can be fixed. However, most of the mobile phone repair points are to replace the motherboard, and those who can repair the motherboard are professional masters.

When I went to repair the phone, I said that the motherboard was broken for the following reasons:

Because the motherboard is relatively high, the repair of the motherboard of the mobile phone may be equivalent to more than 30% of the original price of the mobile phone, in addition to the motherboard has no technical content, a faulty mobile phone, if you need to check in detail, it may take a long time, or the maintenance master does not have the technology to repair, so changing the motherboard saves money and trouble.

Related information: If only some components of the mobile phone motherboard are loose or damaged, the probability of repair is very large, if the mobile phone motherboard burns out the entire circuit due to water or power surge, the probability of repairing the mobile phone motherboard is very low.