The external power supply of the laptop is not powered on, and the indicator light is not on?

If the indicator light on the laptop power adapter is not lit, first we check whether the power adapter is connected to the socket, and there is one at the socket.

First of all, try the following operations: remove the battery and power adapter, press and hold the switch button for 30 seconds to discharge the static electricity, wait for about 15 minutes, and then connect the power adapter separately to power on; If it can't be turned on yet, it is the following reasons. If the boot circuit of the notebook motherboard fails, such as clock, reset, power supply, MOS tube, etc., it may cause failure to turn on, black screen, IO problems, unable to start the computer, black screen, etc., how to deal with it:

Send it to the after-sales service or repair shop to repair the motherboard. The memory and graphics card of the notebook are oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in the inability to turn on, black screen, treatment method: is to remove the power supply, open the back cover of the notebook, take out the card slot of the memory, if it is not soldered in the motherboard of the independent graphics card also take out the card slot, align the memory and the graphics card gold finger part (that is, where there is a copper sheet) with the eraser back and forth a few times, blow the ash, and then insert it back, cover the back cover, and the boot is generally OK.

That is, the video memory of the notebook graphics card is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, because the graphics card is broken, it will naturally not be able to boot, and the screen will be black.

The power adapter is not powered on, the indicator light is not on, that means the adapter is broken, you must buy the original adapter to buy a new one, otherwise it is easy to damage the computer, you can search for the original one on JD.com.

Solution:

1. If the indicator light on the laptop power adapter is not lit, first of all, we check whether the power adapter is connected to the socket and whether there is electricity at the socket. We can try to plug and unplug it again, if the indicator light still does not light up, it should be that the power adapter is broken.

2. If the battery is used as the power supply, check whether the battery is installed correctly, whether the battery model is the original battery, whether the battery is fully charged, etc.

3. After eliminating the first two situations, it is possible that there is a problem with the power module of the notebook motherboard, please carefully check whether the DC board is normal.

4. You can use a multimeter to measure whether the output voltage of the power box is normal, whether the socket on the laptop is loose, whether the switch is effective, or whether the light is not lit when it is turned on, if so, it is probably because the lamp is aging.

5. If the power indicator of the notebook is not lit, first remove the battery to see if it can start the notebook when the power is on, if it can, then the LED power indicator is broken. If it doesn't work, it may be that your computer's adapter is broken. Try to see if you can charge the battery, if you can, then the LED power indicator is broken.

If the problem cannot be solved by the above solutions to the "laptop power light does not light up", it is recommended that you send your laptop to a professional repair shop for repair. Hope this article can help you!