No response at boot, no response at boot?

If you have a problem with the power supply of the host, it is best to ask a professional person to fix it

1. First of all, we conduct a comprehensive check on the connection between the computer monitor and the host, and plug each connection back to see if there is a connection problem.

2. If the fault still exists, then we need to open the chassis to see if the chassis contains metals and other substances, causing a short circuit in the computer host circuit, and then we smell the computer to see if there is a burning smell, and see if there are damaged components around the motherboard and around the CPU.

3. After checking the whole chassis, there is no abnormality in the chassis, then we will dust the chassis.

4. If it can't be turned on, 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.

5. If the fault still exists, it is likely to be the fault of the memory card, graphics card, CPU, motherboard, etc., at this time, we only need to plug and unplug these hardware, or replace it again, and try to find the cause one by one.

6. If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

7. When the computer is turned on and started, the system BIOS starts to POST (power-on self-test), and when a fatal error is detected in a device in the computer, it will control the speaker to send out a sound to report the error. Therefore, there may be a fault that the power is turned on without displaying an alarm sound. If the computer is turned on and there is no alarm sound, the fault can be checked according to the meaning of the BIOS alarm sound to check the faulty device to eliminate the fault.

What machine? Cell phone? Computer? You don't like it's okay, let's be more detailed! Take pictures that you can't tell!

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.

1. If you press the power button of the host, the power light will not light up or turn off when it is on, replace the switching power supply first.

2. If the power light is on after replacing the switching power supply, but it still can't start, press the num lock key, the num lock light will not light up, this situation is generally the motherboard can not start normally. Please shut down, take out the memory, clean the memory gold finger, and then plug it back in.

3, and then check the graphics card, clean the gold finger of the graphics card, reinsert the motherboard, and then try to boot the computer, if the keyboard light is on after booting, press the num lock key, the corresponding light will also be on, which is basically a problem with the graphics card.

4. If the screen is still black, but the display can be normal if you change to another monitor, the display is damaged and needs to be repaired. If the same is true after replacing the monitor, try to replace the graphics card, if it is normal after replacing the graphics card, the graphics card is damaged and needs to be repaired or replaced.

5. If the system just can't boot, there is an error or a blue screen, it can be solved by reinstalling the original system.