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Anonymous users2024-02-12Take out the battery pack in the computer, and then use the power adapter to test the machine, if the fault still exists, it means that there is a problem with the power adapter; If the battery pack can be turned on normally, it means that the battery pack has aged and must be replaced with a new battery pack.
If you can't take out the battery pack and can't turn on properly, there is a worst-case scenario: there is a problem with the motherboard.
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Anonymous users2024-02-11Disconnect the power adapter and replace the power adapter of the same model in normal use, if it can be turned on normally, it means that the power adapter is faulty.
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Anonymous users2024-02-10Computers, or to update in time.
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Anonymous users2024-02-09It is caused by poor battery contact, and the solution is as follows:
1. First on the computer desktop.
in the bottom left corner, find the Start menu and click Enter.
2. In the start menu, find the system settings and click to enter.
3. After entering the settings interface, find the system settings and click to enter, as shown in the figure below.
4. In the left navigation bar of the system settings, find Power & Sleep.
5. Then in the Power & Sleep Settings interface, slide down to find other power settings.
6. Finally, in the pop-up setting interface, you can click to create a power plan and set the power plan, as shown in the figure below.
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Anonymous users2024-02-08The power adapter will work rectified when it is working, so it will emit a certain high-frequency sound. When the load is heavy or the surrounding environment is quiet, the sound of the power adapter will also be slightly noticeable.
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Anonymous users2024-02-071. During the normal use of the power adapter, a weak current sound can be heard in a relatively quiet environment or close to the power adapter, which is normal.
2. The current power adapter sound is obvious, which affects the normal use, which may be the impact of the power adapter hardware operation, and it is recommended to overhaul or replace it directly.
3. The power adapter will inevitably emit a fixed frequency sound when converting the power supply, and the inductance coils of different frequencies will not be the same because of their rated power, so the sound size of the induced current is also different, and there will be a squeaky sound.
4. If there is no unstable power supply, or the sound is abnormally loud, it is generally a normal situation, because the power adapter will inevitably emit a fixed frequency sound when converting the power supply, and the inductance coil of different frequencies is not the same because of its rated power, so the sound size of the induced current is also different.
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Anonymous users2024-02-06If the laptop can't be turned on with either plugged in or with the battery, and there is no response when you press and hold the power button to force it to shut down and turn it on again, most of which are hardware failures.
There are many possibilities that cannot be turned on, such as chipset, IO chip, memory, CPU, motherboard small component failure may lead to not booting, it is recommended to take the computer to the after-sales service or computer repair shop for testing and maintenance.
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Anonymous users2024-02-05The charging port keeps ringing when plugged in, it is recommended to replace the number of power books, or you can go to the official after-sales test of the notebook.
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Anonymous users2024-02-04The power interface of Lenovo notebooks is generally on the side of the laptop, and depending on the model, it is generally near the laptop screen and keyboard.
The working principle of a laptop power adapter is simply as follows:
It is to use the principle of switching power supply to turn the unstable power supply into the constant voltage direct current required by the laptop through the conversion circuit to supply and charge the laptop.
It is worth noting:
This kind of conversion circuit must have a protection circuit (over-current protection circuit, over-voltage protection circuit, short-circuit protection circuit, etc.) to prevent accidents and protect the laptop from burning.
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Anonymous users2024-02-03Check whether the voltage and current output of the power adapter are normal, if the power adapter of the same model can be turned on normally, the current power adapter is faulty.
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Anonymous users2024-02-02The power adaptation sliding car will carry out rectification work when working, so it will emit a certain high-frequency sound that will make the year high. When the load is heavy or the surrounding environment is relatively quiet, the sound and spine of the power adapter will also be slightly noticeable.
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Anonymous users2024-02-01The power adapter will work rectified when working, so it will emit a certain high-frequency sound. When the load is heavy or the surrounding environment is quiet, the sound and spine of the power adapter will also be slightly noticeable.
I also like to do it myself.
But the landlord had better buy a substitute adapter to test the machine (the original is too expensive, there is no need to buy it.) Just look at how many volts your adapter is, buy one, it's fine, dozens of dollars) >>>More
The greater the current, the greater the damage to the computer hardware, because the original is the most suitable for the hardware needs of the notebook itself!
The landlord said very abstract Oh,You say the notebook is good or bad,10000 yuan is definitely better than 5000 yuan,In fact, it's really good or not, first of all, it depends on whether the book meets your requirements,Then look at how cost-effective it is,If both are suitable, you can pay to take it home。 I don't know what performance machine you want,But here is a model recommended to you,Netbook V200,It's cost-effective is not said,You can refer to it,V200The specific performance is as follows: >>>More
Hard disks are usually composed of two parts: electronic circuits and mechanical parts, and as time increases, the wear and tear of mechanical parts increases, and finally manifests as loud noise when reading disks. If your hard drive has been used for a long time, such as more than three years, I think it may be a signal before the end of the hard drive, and it is imperative to back up the valuable data in the hard drive to another storage first in case of accidents. >>>More
Your machine may have been around for a long time, 1. The power failure is due to a lot of dust, CPU overheating protection, and it will automatically power off. You can use an airbag to blow air inside the air outlet of the fan, but don't use the hair dryer that you use to blow your hair, if it can produce cold air, then the computer will really hang up. >>>More