What s going on when the laptop turns on and doesn t respond

The laptop does not respond when it is turned on, which means that after plugging in the power adapter, press the power indicator of the key computer and do not light up, and listen to the sound of the fan turning. This fault is called "no power" in notebook maintenance, and its probability of occurrence is second only to the black screen at startup, and it is a common fault in maintenance. We need to make corresponding solutions for specific situations.

Generally, the notebook that does not respond to boot caused by this situation is relatively simple, and it can be replaced directly, but it is only limited to the power supply of the same model and the same specification. There is a situation that needs special attention, that is, when you plug the power adapter into the power port of the notebook, the indicator light of the power adapter goes off, do not think that it is the fault of the power supply itself and try it repeatedly, this is a typical serious short circuit of the motherboard.

If you use an adjustable power supply to power up the notebook, the adjustable power supply will automatically protect, because the current has reached more than 5A instantly, and the laptop power supply will not automatically protect, which will inevitably cause a wider range of electronic components to be damaged.

The notebook boot does not respond to the reason 2: the notebook motherboard is faulty. Laptop motherboard failure is the most common reason why the laptop does not respond when booted, mainly caused by bad power port, water corrosion, electrostatic breakdown, motherboard circuit damage, etc.

A bad power port is the simplest of the motherboard failures, and other situations should be studied separately.

Water corrosion: It causes the laptop to boot up and does not respond is the most difficult to repair, if the treatment method is timely and correct, the loss can be minimized. If you simply wipe the water on your surface and blow it a few times, even if you can use it at the time, there will be all kinds of strange failures after a long time, and it will be much more complicated to repair.

Electrostatic breakdown: This is mostly when you disassemble the machine for maintenance, such as cleaning the fan and adding memory without anti-static measures, the climate in the northern region is dry, and items will more or less have static electricity. The integrated circuit in the notebook is extremely sensitive to the phenomenon of electrostatic discharge, and the strong high voltage of the electrostatic discharge in an instant is very capable of breaking down the oxide film inside the integrated circuit.

The possible reasons are as follows:

1. If there are two memories of motherboard failure and memory failure, it is recommended to pull out one memory and keep one memory for boot attempt.

2. Graphics card and screen cable failureGeneral graphics card and screen cable failure can usually enter the operating system, if you have set up the boot**, if you can hear the sound of entering the system when you boot up, it means that the graphics card or the screen cable is faulty or loose. For the above hardware failures, it is estimated that the vast majority of users cannot handle it, so it is recommended to send it for repair.

3. Loose hardware, such as loose memory or graphics card, especially the memory has the greatest chance, try to plug it in and unplug it again.

4. If the motherboard BIOS error is caused by the motherboard BIOS error, you need to clear the BIOS, complete the discharge operation, and reset it. The above reasons can only answer for you a general direction of failure, for Xiaobai, even if we encounter hardware failure, we can't repair it ourselves, but we can try whether the hardware is loose and the motherboard clears the BIOS.

If you plug in the adapter directly and turn it on, there is no response, it may be caused by a problem with the hardware, or you need to take it to the after-sales service for testing.