The computer can t be turned on, the motherboard is short circuited, and the computer can t be turne

What is the situation of the motherboard short circuit you mentioned, is the computer unable to start, or the screw you said is wrong when you turn it, it is estimated that the model of the screw is wrong, as long as it does not fall on the motherboard when it is turned on, it should not be short-circuited.

Dear Lenovo users, hello!

There are many causes of a short circuit, and we can't tell what exactly is causing your situation. In addition, connecting the wrong screw will generally not cause a short circuit.

If the above solutions do not solve your problem, you are welcome to use the official WeChat of Lenovo service ** consultation, click on friends on the mobile phone WeChat, add friends, search number, enter "Lenovo service", add Lenovo service official WeChat, you can consult anytime and anywhere, service time 9:00-21:00.

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It's true that the motherboard short circuit can't be repaired, and if you want to minimize the cost of dealing with this matter, there is only one way to replace the motherboard (unless you are a legendary god who can solder circuit boards).

It is possible to disassemble the hardware that can be used by the host and reassemble a new one.

Reasons and solutions for computer not turning on:

Step 1: If the power supply does not respond, then check whether there is a problem with the power supply, poor contact, hardware, etc., and go to the second step, if it is unable to enter the system, it may be an operating system or software problem to go to the third step.

Step 2: Check whether there is a power supply problem, first see if the power supply is not plugged in well or there is a problem with the plug, if you are using a battery, then plug it in and try again. You can go to a friend or go to a computer repair shop or sales store to find the same model of power supply to try it.

After replugging the power supply, press the power button again, and if it still can't be turned on, then press it for a while. If you change someone else's power supply to turn on, it means that there is a problem with the power supply, if it proves that the power supply is fine, it may be the hardware reason, go to the fifth step.

Step 3: Go to the last correct configuration to adjust, turn on and press and hold F8, enter the advanced options page, select "The most recent correct configuration", and press Enter. If it can enter the system, it may be caused by viruses, incompatible hardware drivers with the system, or operating systems.

After entering the system, run the anti-virus software, check and kill the virus, if there is a virus, restart the computer after the anti-virus, if it is not normal, it may be caused by the incompatibility of the device driver and the program, delete the graphics card, network card and other drivers, restart it after removing the driver, if there is still a problem, then go to the next step.

Step 4: Repair and install or reinstall the system, set "Optical Drive as the first boot device" in the BIOS, then insert the system disk, and press the R button to perform "Repair and Installation". If the fault persists, just at the beginning of the system, select "One-click GOST to restore the system" or use the system disk to reinstall the system.

Step 5: Check whether there is a hardware problem, disassemble the notebook to see if 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 the memory or motherboard has a problem, 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.

In addition, pay attention to whether it is caused by the new hardware, if it is normal before the replacement of the hardware, and it is not normal after the replacement, then check whether it is compatible. If it can't be started at this time, it is best to send it for repair, and the professional will check whether there is a problem with the hardware one by one.

The causes of short circuit on the computer motherboard are:

1. The computer motherboard is wet, which may short-circuit the computer motherboard.

2. The power quality of the computer is poor, and the output voltage is abnormal, which makes the electronic components break down and the computer motherboard is short-circuited.

3. The quality of the chipset and other components on the motherboard is not good, which causes the motherboard to age and damage, resulting in the failure of the motherboard.

4. Due to dust and static electricity, the motherboard is faulty due to poor contact of the motherboard, short circuit or burning of the chipboard on the motherboard due to dust or static electricity.

5. Moisture, or water ingress, resulting in the motherboard PCB corrosion and short circuit.

6. Small insects enter through the heat dissipation port, resulting in a short circuit.

Situation 1: 1. If the motherboard is installed on the computer, it is connected to the power switch of the chassis, so it is more convenient to find the power switch jumper of the motherboard.

2. Dial up the cables connected to the motherboard one by one, and find the two binding posts connected to powersw, which are the power switches we are looking for.

3. Use a screwdriver to gently connect these two binding posts, if it is normal, then the motherboard can be started.

Situation 2: 1. If it is a new motherboard and there is no circuit connection with the chassis, you can find some small letters next to the binding post.

<>3. At this time, the same connection is made, and it can also be turned on or off.

If the device cannot be turned on normally, or there is a screeching sound when the machine is turned on, it means that it cannot pass the boot POST.

After turning on, the computer indicator light is on, but the screen is still black;

You can enter the system, but the motherboard has abnormal noise;

The running system is a blue screen, a black screen appears, and now;

Some features in Windows cannot be used normally;

Note: The computer should pay attention to anti-vibration, especially during operation; Moisture-proof, start often, if you don't turn on for a long time in the wet season, blow it with a hair dryer before turning it on to prevent the motherboard from short circuiting.

If there is a short circuit in the motherboard, such as the MOS tube in the power supply part of the CPU is broken, then there will be no response when the power button is pressed, or the fan will stop as soon as it turns, this is because the power supply detects a short circuit in the output and the protection action is caused by turning off the output.

Hello friends:

If there is a short circuit in the motherboard, it will not turn on, freeze, black screen, or suddenly freeze in use.

Hope it helps you and I wish you happiness

If the integrated circuit is broken, you can't see it, but you can't turn it on; If the integrated graphics card module is broken, it can be turned on without displaying or blurring the blue screen or something; If the heat dissipation module is broken, then it can be truly experienced, high temperature, alarm, restart, etc.; As for physical damage, as long as there is no strong vibration (resulting in loosening), water ingress, and short circuiting with things, physical damage is not within the three guarantees, and you can only chop your hands in this case. But on the other hand, the occurrence of the above situation does not necessarily mean that the motherboard is broken, and it needs to be investigated.

This may result in the motherboard being completely scrapped!

You can open the chassis and find the cable that connects the chassis boot button.

There are two pins on the corresponding motherboard, and those two pins can be shorted to turn on.

Pressing the button is actually a short circuit, and the motherboard receives the signal to turn on.

The power supply of the chassis is actually on all the time, not a real power off) 2The power supply is plugged into the interface of the motherboard, and there are more than ten wires in a bundle of that interface, and you can turn on any two short circuits of black and orange.

3.The power switch of the case is connected to the motherboard of the computer through a wire, and if you unplug this cable from the motherboard, you will find two pins, and you can use the key to shorten these two pins.

4.Cut out the motherboard electromagnetically and put it back after 30 seconds. Or swap the jumper on the electromagnetic side.