The kind of laptop that doesn t turn on, and it doesn t turn on.

1. Use a multimeter to check whether the socket is normal and whether the power supply voltage is 220V

If the mains voltage is abnormal, it is recommended to replace the use environment test.

2. Use a multimeter to check whether the output voltage and current of the power adapter are consistent with the labeled.

If the gap is very large and the mains voltage is normal, it can be judged that the power adapter is faulty and the laptop power adapter needs to be replaced.

3. If the above checks are normal, remove the laptop battery and do not connect an external adapter.

Press and hold the power on/off button for 5 seconds and repeat 3 times. After releasing the residual charge of the notebook, plug in the power adapter separately and power on for testing.

4. If the fault persists, check the power interface of the notebook to see if it is abnormal.

For example, looseness or cosmetic damage.

5. The above checks are normal, and basically it can be preliminarily judged that the notebook motherboard is faulty. It is recommended to send the service station for repair.

If it's a problem with the power adapter, buy an OK, as for**It depends on the model of your notebook, ranging from dozens to two or three hundred, but the adapter can also be repaired, specific**I don't know very well, you can go to the repair shop to ask.

Plug in the end of the computer to disassemble and repair it, but I don't agree, it is recommended to think carefully, do not burn the notebook, it will be worth the loss, it is recommended to find a professional.

It may be that there is a short circuit inside the computer connector, or that some part of the computer motherboard is burned, resulting in a short circuit, and the power indicator will flash and flash, so you can take it for repair and let someone test it for you, and it is estimated that it is a short circuit of some component of the motherboard.

Don't use the battery anymore, okay, replace the adapter and try it.

1. Power supply problems.

If it is an external power supply, first see if the power supply is not plugged in properly or there is a problem with the plug. If you use a battery, it may be that the laptop is running out of power, as long as you charge it more before using it, you will solve this problem.

2. The motherboard is faulty.

Motherboard failure is the main reason why laptops won't turn on. It is often caused by factors such as liquid ingress of the notebook, damage, and damage to the components of the motherboard itself.

3. Circuit failure.

In addition to artificial liquid inlet and short circuit, most of the failures of laptops that cannot be turned on are problems with the protection isolation circuit and the failure of the boot circuit and EC peripheral circuits, and sometimes the circuit is burned out in large pieces.

4. BGA failure.

BGA failure is also one of the faults that cause laptops to fail to turn on, and it is extremely common in notebooks that use DBM as the Southbridge chip in the Swift Relaxation generation.

The reasons and solutions for the failure of the laptop to turn on the power are as follows:

1. Problems in dismantling batteries and power supplies

Check all cables, including power plugs, to make sure all devices are connected correctly and securely together. Check if the laptop has power (although most people don't make such a low-level mistake), because the laptop has a built-in battery, so it can be used without plugging in the power supply, of course, the time is limited, when the built-in battery runs out and is not charged, it will cause the laptop to not turn on, at this time we just need to plug in the power to charge. (as shown in the image below).

2. Hardware problems:

Disassemble the notebook to check whether the hardware is loose, generally the hardware is not plugged in well, there will be an alarm sound, the long sound continues to sound that the memory module is not plugged in tightly, one long and one short means that there is a problem with the memory or motherboard, and one long and two short means that the graphics card is wrong. If there is too much dust inside the notebook, it is best to clean it up first. (as shown in the image below).

3. Display problems:

If the power supply** is normal, but the screen is still dark, try connecting another monitor to your computer (you can borrow one if necessary) to make sure it's not a problem with the monitor. (as shown in the image below).

4. Loose memory module:

Listen to the computer to see if it beeps, and if it is, it may be that the memory module is loose. Check the back of the computer, there is a small area to loosen the screws, in the case of power off, take out the memory inside, insert only one piece of memory, power on the test, if it doesn't work, change it, continue the test. (as shown in the image below).

Other ways to deal with laptop can't turn on:

1. Remove the battery on the back of the notebook, use the power adapter to connect to the computer, and try to turn it on.

2. If you only use the battery, do not connect the power adapter, and the boot is not normal, then it should be caused by a problem with the power adapter or a short circuit in the power interface of the notebook.

3. Unplug the power cord, remove the battery, and press and hold the power button for 30 seconds without letting go. Try to boot up, if the boot is normal, then it is only caused by the motherboard BIOS is not normal.

4. Unplug the power cord, remove the battery, open the back cover of the memory, plug in and unplug the memory, wipe the gold finger part with an eraser, and plug it back in. <>

There are several reasons why the computer does not turn on the power, the first may be that the charger is damaged, and the laptop cannot be charged after it runs out of power, and the charger must be replaced. The second is that the laptop computer is completely damaged and must be repaired before it can be restored. Then the power on and off button is damaged, and the probability is relatively small.

There may be a power adapter issue. Try to turn on the laptop's own battery, if it can turn on normally, it is a problem with the power adapter, just change it.

If you can't use the battery that comes with it, it's a problem with the computer itself. I need to ask for a master.

Is the battery charged? It is recommended that you unplug the adapter and use the battery alone to see if it can be turned on? Unplug the battery, use the power adapter alone, and see if it can be turned on? If neither method can be turned on, it must be that the internal power supply circuit is faulty, and you must find a professional maintenance master to repair it.

The switch is broken or out of power, or the system is broken, or the hardware is broken.

Cut off the battery of the notebook, directly connect to the power supply to try, if not, go directly to the after-sales service to test the charger.

The power supply is broken, so let's replace it with a new one.

1. If the laptop cannot be turned on for a long time, you can try to pull out the battery, and then use the power adapter to power it, and it can probably be turned on successfully.

2. Then plug in the battery and see if the charging indicator lights up normally. If the charging display is lit, the battery can still be charged. You need to turn on the battery after it is fully charged.

3. If there is no signal to enter the monitor, you can open the BIOS system by restarting and installing the F12 button, and then reinstall the system to recover.

The power connector on the top of the laptop is broken, and the inside is in poor contact. Then there is the internal isolation circuit or charging circuit of the notebook is broken. These situations are generally not handled by yourself, and you can only find some professional places to repair notebooks.

Laptops are highly integrated and generally have no connectivity issues.

If it doesn't turn on, or it doesn't respond when it turns on, you first suspect a problem with the battery or power adapter.

Plug in all the ports of the power adapter tightly, charge it for a while, and then turn it on. If there is still no response, send it to the repair shop, this has to be disassembled for testing, and you can't do it yourself.

1.Check all cables, including power plugs, to ensure that all equipment is correct and secure.

2, Check if the laptop has power, because there is a built-in battery in the laptop, so it can be used without power, of course, when the built-in battery is done, it will start the notebook. At the moment, we just need to plug in the electricity to charge.

What are the reasons why a laptop won't turn on?

Reason 2: It may be caused by an infectious disease.

Press F8 by Captain, enter the Advanced Options page, select "Recently Configured Configuration", and go back. Once in the system, run the antivirus, kill the virus, if there is a virus, restart the computer after anti-virus, if it is not normal, it may be caused by device drivers and programs, delete graphics, network cards, etc., remove graphics, network cards and other drivers, restart after removing drivers, if you are unable to do this, you will be excluded.

Reason 3: Hardware issues.

Remove the laptop to see if the hardware is loose, the regular hardware will have an alarm and pause indicating that the memory module is not plugged in. For a long time, there was a problem with the memory or motherboard, and the graphics error was shorter twice. If there is too much dust in your laptop, it's best to clean it first.

Also note that it is caused by new changes in the hardware hardware. If it changes, it won't work, then check if it's compatible. If you can't boot at this point, it's best to send it and a professional will check your hardware for problems.

Reason 4: Display Problem.

If the power supply is normal, but the screen is still dim, try adding a monitor to your computer (you can borrow it if necessary) to determine the problem of not showing up.

Reason 5: Operating system issues.

1.Start with a security model. Windows starts to enter the boot menu and then press the specified key while selecting Safe Mode.

Usually, when you choose Safe Mode, Windows will try to fix it and then close it. If you have Windows Vista installed, you can try selecting "Repair Computer" from the boot menu (if this option is not in the Start menu item, go to the Vista installation CD to find it). You will have many options to repair your computer, and Start Repair is definitely worth a try.

The above are the reasons why the laptop won't turn on the machine and the corresponding solutions, I want to help you.