How to detect if there is a problem with the phone s hardware, such as the motherboard and screen

1. Look at the appearance: the motherboard is seriously deformed, the chip has been burned, and the surface electronic components have fallen off.

2. Power-on: Connect the ammeter to check the current. The current of normal boot is regular, if there is no current or a large current, it means that the motherboard is damaged.

3. Check whether the keys of the mobile phone are stuck and whether the battery contact is good.

4. Connect the computer with the original data cable, if it can be turned on normally, there is no problem.

Mobile phone motherboard fault symptoms: the performance is generally the system boot failure, no screen display, boot black screen of death, unable to boot, no sound, unable to play**, no network.

Hello The phone has fallen, and the steps to detect whether the motherboard is damaged are as follows: 1. The fault symptoms of the mobile phone motherboard include system boot failure, screen no display, boot black screen of death and failure to boot, etc. 2. It is also manifested as fever, no sound, inability to play ** and no network, etc.

3. According to the appearance, whether it is seriously deformed, the chip is scorched and the surface electronic components fall off. 4. Check whether the current is regular, if there is no current or the current is very large, it means that there is a problem with the motherboard.

Q: What if it lights up when charging? However, it is not displayed.

<> can be brightened, it means that there is no problem with the motherboard.

Question: OK, thank you, you're welcome.

Question: Can I still repair the motherboard if it is broken? If you can fix the ** in the phone, is it still there? Is there any damage?

There is no need to repair the motherboard if it is broken, and the repair cost is too high.

There is an important ** in the main question.

You can put this motherboard on another phone and pour it out.

Symptoms of mobile phone motherboard failure: the screen does not respond when the mobile phone starts, or the system cannot be started, or the machine cannot be turned on directly; There is also the possibility that you can't see the network after turning it on, can't answer**, etc.

Causes of mobile phone motherboard failure: water ingress, falls, unstable charging voltage, etc.

How to judge the fault of the mobile phone motherboard:

1. Take out the battery first, and conditionally replace it with a spare battery to start up and check (do not do this for mobile phones that have entered the water).

2. Check whether the keys of the mobile phone are stuck; Whether the battery is in good contact.

3. Take out the memory card and number card.

4. Connect the computer with the original data cable.

What can happen if there is a problem with the screen of the phone:1The phone won't turn on, and the screen keeps going black 2The screen touch is unresponsive 3The screen is not sensitive to touch, stuttering, the image is not clear, etc.

If there is a problem with the motherboard of the mobile phone, it may be due to the failure of the internal connector or cable of the mobile phone.

The mobile phone screen will be tested before assembly, so it may be that the screen fails or is damaged due to external forces or other reasons during use. The mobile phone screen test is connected by a high-current shrapnel microneedle module, which can not only be used continuously, but also the self-cleaning design of the shrapnel head type can also keep the shrapnel free from contamination and ensure the long-term stability of the test. In the test, the shrapnel microneedle module uses different head shapes to contact different test points, which is conducive to the conduction of current and signal transmission.

Hello: Xiaomi BAI engineers will carry out testing and maintenance. The test results will be mailed to you along with your mobile phone. Thank you for your support and I wish you a happy life!

If you can't turn it on, you can be sure that the hardware is broken. To be able to enter the standby interface, it depends on the functions of the mobile phone to determine which part of the hardware is problematic.

4. Click "One-click Physical Examination" to detect hardware such as speakers, earpieces, microphones, vibrators, cameras, touch screens, and display screens.

6. If there is a problem with the mobile phone, the application can query the address of the corresponding mobile phone after-sales outlets, and can find the after-sales outlets in time and send them for repair and after-sales.

The first test is ** There is a problem, and then disassemble the phone, since it has been repaired, it definitely needs to be disassembled.