Why is it not recommended to repair a damaged mobile phone motherboard?

Why is it not recommended to repair a broken mobile phone motherboard?

Because mobile phone motherboards are relatively expensive, the general maintenance cost is more than 300 yuan. Because most mobile phones on the market currently have a double-layer motherboard design, if there is a motherboard failure, repair It is very troublesome to operate. Improper operation will directly cause the motherboard to be scrapped. Even if it can be repaired, there will be a certain failure rate during use.

If the motherboard of your mobile phone is broken, can you repair it yourself?

It is not recommended to repair it yourself. Because the mobile phone motherboard is the core component of the mobile phone, if you do not have professional knowledge and technology, repairing it yourself may cause greater losses, such as the inability to start the phone, the inability to charge, and unstable battery. In addition, repairing the motherboard of a mobile phone by yourself may cause safety hazards. For example, excessive use of electrical tools such as welding guns may cause electric shock due to leakage. If a mobile phone motherboard fails, it is recommended to choose a professional mobile phone repair shop for repair. The repair shop has professional technology and equipment, can provide more complete repair services, and can also guarantee the repair results.

Examples of repairing mobile phone motherboards that do not turn on?

The mobile phone cannot be turned on. The low current at startup is about 5-15MA (the main reason is that the processor is not working)

●The clock circuit is not normal (13M and 32.768K)----Voltage, AFC , Frequency

●The clock crystal itself is damaged;----Replace the crystal

●The clock crystal generates a signal but is not sent to the processor;----Check the crystal output to the processor The line between

●The clock crystal power supply is abnormal (check the power supply or transistor power supply tube)

●The reset voltage is abnormal, mainly because the reset circuit is not working properly (check the power circuit or a separate Reset tube)

●The power supply of the processor is abnormal, usually caused by the power IC not outputting VCC voltage or the power supply tube itself not supplying power

●The processor itself is damaged (direct replacement)

How to repair the mobile phone motherboard after it is disassembled?

Remove the main board of the mobile phone, check the model of the mobile phone, and replace it with a new mobile phone main board.

How to repair the broken line on the mobile phone motherboard?

1. Contact after-sales service for repair

Once the problem of broken mobile phone motherboard cable occurs, users can contact the mobile phone manufacturer’s after-sales service center for repair. If it is within the warranty period, it can be repaired for free; if it exceeds the warranty period, you will need to pay a certain fee to repair the problem. Usually, after-sales service centers have higher technical levels and rich repair experience, and can find the cause of the problem and perform repairs more quickly.

2. Operate DIY for repair

If you are an advanced technology enthusiast, you can repair the problem of the mobile phone motherboard cable by studying the repair methods yourself. First of all, you need to clearly understand the internal structure and working principle of the mobile phone; then, prepare some professional tools and repair fluid and other materials; finally, perform the repair work step by step. If you don't have the technical knowledge in this area, it's best not to attempt DIY repairs to avoid causing more damage.

3. Replace spare parts for repair

If the motherboard circuit cannot be repaired, the last resort is to replace spare parts. Normally, users can buy corresponding spare parts through online shopping platforms and replace them according to the instructions given by the manufacturer. At the same time, in order to prevent the purchase of spare parts of poor quality, it is best to choose products from well-known brands that are guaranteed.

How to repair the motherboard of a mobile phone that is seriously damaged?

How to deal with a broken mobile phone motherboard:

1. Take out the battery first, replace it with a spare battery if possible, and start the check (do not do this for a phone that has been flooded with water).

2. Check whether the buttons of the phone are stuck; whether the battery contact is good.

3. Take out the memory card and number card.

4. Use the original data cable to connect to the computer.

5. Power on. Connect an ammeter to check the current. The current during normal startup is regular. If there is no current or a large current, there must be something wrong with the motherboard.

What should I do if the motherboard of my mobile phone is broken during the warranty period?

If your mobile phone is within the warranty period and the motherboard has a performance failure that is not caused by human damage, you can enjoy free repair service.

If your mobile phone has expired the warranty period, you can choose to pay if there is a performance failure that is not caused by human damage within the 8th to 15th day (including 15 days) from the date of purchase. You can choose to replace the product with the same model and specifications, or choose to repair it for free.

If there is a problem with the motherboard of your mobile phone, and there is no liquid, corrosion, serious deformation, private disassembly, private repair, etc., you can participate in the fixed-price motherboard repair.

The above is the detailed content of Why is it not recommended to repair a damaged mobile phone motherboard?. For more information, please follow other related articles on the PHP Chinese website!