The computer pressed the power button and there was no response

It's not the reason for the CPU, as long as the CPU can be plugged in, it's right. It should be that the plug of the power button is not good. You check the few thin wires connected to the boot button to see if they are plugged in correctly.

Dear Lenovo users, hello!

You can try resetting your computer

Turn off the computer first, after the host is safely powered off, unplug the power cord and other connecting cables behind the chassis, press the power switch for 3 times without connecting the power cord at an interval of 1 second, and then wait for a few minutes to plug in the relevant wires, and finally plug in the power cord, and turn on normally to detect whether it is normal.

If it still can't be turned on, it is recommended that you contact the nearest service network for maintenance

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Method 1. Press the boot button to start the win7 system, then press and hold the F8 key to enter the advanced boot options of the Windows 7 system, use the arrow keys on the keyboard to select the "Latest correct configuration (advanced)" option and press the Enter key.

Method two. Similarly, press and hold the F7 key when starting the Win8 system to enter the Windows Advanced Startup Options, the arrow keys on the keyboard "After selecting the "Repair Computer" option, press the Enter key and you're good to go.

Method three. If the problem still cannot be solved, then it may be that there is a bug in the system, causing the problem of system file corruption, it is recommended that you reinstall the system and then update the system patch to solve it.

If you forcibly shut down and press the power button and there is no response, then he should be in the process of shutting down, usually more than half a minute and less than a minute. Including opening is also like this. If it's an old machine, maybe it will take longer.

Otherwise, you turn it off and unplug it and try again to see.

This may be due to the bad contact of the power button, you re-plug the switch, and then try the power button a few more times?

This situation is generally caused by the following reasons:

Hardware:1The equipment is unstable due to poor board contact or quality problems.

2.Poor heat dissipation of the computer causes the CPU or graphics card chip to die due to excessive temperature, including hardware design flaws, such as certain recalled graphics cards or computer parts.

Software: 1. The user is controlled by a remote Trojan, and everything on the computer is in the hands of hackers.

2.Viruses or malicious plug-ins invade the system, resulting in system damage. Use anti-virus software such as 360 to check and kill.

3.The driver installed on the computer is not compatible, and the computer will crash after running for a period of time.

4.The compatibility of the software itself, the serious conflict between the software incompatibility and the system conflict, and the computer crashes.

Solution: Usually move the mouse first, then press the Caps Lock key on the keyboard or the num lock key on the keypad to see if the keyboard light will still turn on or off, and then look at the hard disk running indicator on the chassis, if all of them are unresponsive, it should be a crash.

Generally, you need to press the hot start button on the chassis to restart. But sometimes some programs run into problems, accounting for almost all of the resources, especially when the computer configuration is not good, it will cause the computer to be very stuck, the mouse will not move, press the keyboard key to wait for a long time before the indicator light will react, in this case, the general hard disk indicator is still on, this is to wait patiently for the program to run normally, if you are impatient to wait then open the explorer to end the program, or press 2 times ctrl+alt+del to restart.

Therefore, when encountering a computer card, you must first judge clearly, don't restart it casually, even if you press the hot start button of the case, it will damage the hardware!

This needs to unplug the memory, and then turn on the computer to see if the motherboard is long, and then the motherboard's battery is discharged, and then the memory is plugged in after running for a while.

Listen first after turning on the power, is there any fan noise, if not, because it may be that the switch on the main chassis and the motherboard are in loose contact, this can be plugged in again, if you don't know, press all the plugs on the motherboard. If it doesn't work, change the power supply. If there is noise, open the case and check the memory motherboard one by one.

1. Check whether the power cord of the host is plugged in and powered on;

2. Press the power button, is there no sound, no indicator light is on;

3. Open the main chassis, press the power button again, whether the power supply fan is rotating, and whether the CPU fan is rotating;

4. If the power supply fan does not rotate, it means that the power supply of the host is faulty; If the power supply fan is rotating, it may be a motherboard fault, find an acquaintance or go to a repair shop to take a look.

It seems to be burned out.,Open the chassis and plug in the memory or something.,If it's not good, first suspect the power supply.。

Forcibly shut down as much as possible, it is easy to burn in. Some running programs are too late to run, which is easy to cause failures. Try unplugging the memory module and plugging it in again. If not, find a professional to take a look.

The host is disassembled, the memory is unplugged, wiped clean, and then installed it.

Is there a problem with the computer before the strong shutdown There should be a part burned.

Here's why:

1.The power supply, motherboard, and CPU, at least one of the three major pieces is broken.

2.The computer is powered on and booted in the order of use, in the order of the power supply, motherboard, and CPU. If one of these three things is faulty, the other hardware will not be alarmed.

The CPU generally does not break, and the power supply may not be broken if it is turned, and the motherboard is the most likely to break among the three.

Solution: 1. The CPU fan is turned to indicate that the power supply is normal, and the fan is connected to the power supply normally.

2. If the keyboard light is not on, it means that the keyboard interface is not powered or a part of the motherboard is open.

3. If you pull out the memory and do not give an alarm, it means that the machine has not started at all.

4. It should be that a part of the motherboard is in poor contact, and it should be inspected and repaired.

2.In addition, if the computer case has been turned on, but the display screen is still black, then it is possible that the power supply of the display is not connected or there is a problem with the connector connected to the computer case,..

3.If there is no problem with the above, then it may be that there is a problem with the motherboard wiring, then we need to send it to a computer repair shop for a professional to overhaul it.

Ask if the motherboard is broken, whether it should be repaired or replaced.

Repair** is too expensive, it is recommended to replace it.

After pressing the power button of the computer, the computer cannot be started, and there is no POST or the phenomenon of entering the operating system, which often makes the user unable to deal with and affects the normal use. Here, we make a brief analysis of common fault phenomena, analysis and solutions, hoping to help users who encounter such problems.

There is no reaction after pressing the power button.

Fault phenomenon: After powering on, the screen does not have any display, and no "dripping" sound of the motherboard speaker is heard.

Fault analysis: The internal BIOS data of the COMS chip of the motherboard is damaged by CIH virus or static electricity, etc., and cannot be read, and the system cannot complete the self-test when it starts, so it cannot be started.

Known solution: Contact the motherboard manufacturer to replace the COMS chip with a new one or find the BIOS file provided by the motherboard manufacturer and write it to the burner.

Fault phenomenon: After pressing the power button, the optical drive light flashes, the motherboard power prompt light is on, and the power supply is normal, but the screen is not displayed, and there is no "drip" sound.

Fault analysis: This phenomenon occurs after the CUP is damaged, the BIOS first checks the CPU during the self-test process, the CPU is damaged and cannot pass the self-test, and the computer cannot be started.

Known workarounds: Check if the CPU is installed correctly, check if the CPU core is damaged, check if the CPU is damaged using the replacement method, and replace the CPU if it is damaged.

Fault phenomenon: there is no display or prompt when the boot is turned on, the motherboard power supply is normal, the cup is normal, the fan is normal, but the screen is not displayed. There is no "drip" sound of passing the self-test.

Fault analysis: After the computer is used for more than 3 years, the voltage of the battery that powers the BIOS settings gradually decreases, and the data cannot be saved.

Known solution: Buy the lithium battery of CR2032, replace the existing battery on the motherboard to complete the self-test normally, and then reset the BIOS parameters.

I've been in this situation before, and it's probably caused by the following situations.

The computer has been used for a long time, and the internal dust is too thick to cause a short circuit or overheating of the parts and cannot be started - the solution is to clean it up as soon as possible, find a repair shop and use a fan to blow it;

The partition glue between the CPU and the fan is burned dry, and the CPU temperature is too high to start normally due to the start-up - it is manifested as a CPU alarm, go to a repair shop to apply glue for 5 to 10 yuan to solve;

The aging of the power supply circuit causes a short circuit and cannot be started - it is manifested as overheating after not being used for a long time, abnormal fan rotation, etc., the best solution is to replace it with a bad one;

The system is unstable and cannot be started due to loose parts and poor contact - the computer usually vibrates greatly, so the solution is to open the shell and check the stability of the parts one by one (graphics card, memory module, hard disk, connection lines, CPU, etc.).

That's about it, I have other questions, send me a short message, and I'll definitely reply sooner or later

What should I do if the computer does not respond after pressing the power button? What is the problem that the computer cannot be turned on after pressing the power button? Recently, several users have reported that the computer has not been able to turn on normally after pressing the boot button, and the following will give you an analysis of the specific reasons and solutions.

Don't panic when this kind of problem occurs, start to check from the smallest possibility, first check whether there is a problem with the power cord, you can first unplug the power cord and plug it into the rice cooker to try whether it can be connected to the power supply (the power cord of the rice cooker and the power cord of the computer are universal), if it can be powered on, the power cord is good, and then check whether the socket has poor contact, if you change the socket can start normally, it means that the power cord and the socket (or the socket on the wall) have poor contact.

The above methods have been tried or can not start normally, the next thing is to check the power supply problem, some power supplies are with their own switches, check whether your power supply has a switch, if so, check whether it is in a closed state (sometimes you yourself turn off and forget), if it is in a closed state, please turn on, if you still can't start the power supply, you can ask a friend to borrow a power supply with the same rated power to try, if it can start normally, it means that your power supply is broken, if it still can't start, The next step is to consider the issues on the motherboard.

First of all, check whether the power supply interface of the motherboard is loose, unplug it and plug it back in, if it still doesn't respond at all, then you have to consider the motherboard problem, there are many reasons for the motherboard problem, I will tell you in detail when I go back, you try the above method first.

1.The jumper connecting the case button to the motherboard is loose.

The battery is dead, and one of the diodes in the power supply is broken.

3.The graphics card burned and short-circuited.

4。Power overload protection.

Then check the connector of the power supply first, if there is no problem with the external connector, check the internal connector, and then turn it on.

If it can't be turned on, check the power supply of the host, unplug the 20p motherboard power supply, and short it with a metal wire.

Green and black.

The power cord, if the power supply is good, you can start, if you don't understand, the power supply is broken.

If it's good, try putting it on the chassis.

Reboot button heel. The power keys are interchanged, and it's fine.

What should I do if the laptop doesn't respond when I press the power button.

You can try plugging and unplugging the power cord, or discharging the battery, or just plugging and unplugging the memory module, and use an eraser to erase the gold finger on the memory module.

The basic judgment is correct! This is also the case with previous CIH viruses destroying BIOS.

How to troubleshoot the failure of the computer without display when it is turned on (check whether the motherboard has any bulging capacitors).

Step 1: First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated.

Step 2: If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, and smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged.

Step 3: If not, then clean the dust off the motherboard and check if the computer is in good condition.

Step 4: If the fault persists, unplug the reset cable on the motherboard and connect it with other switches and indicator lights, and then use the change cone short-circuit switch to see if it can turn on.

Step 5: If you can't turn on the computer, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device.

Step 6: If the fault persists, the fault may be caused by devices such as memory, graphics card, CPU, motherboard, etc. Then, use the plug-and-unplug method, swap method and other methods to check the memory, graphics card, CPU and other settings respectively.