Why can t the computer turn on when the computer cable is plugged in?

There must be a problem with the computer hardware, and it is best to use the replacement method to eliminate the problem, and the judgment method:

1. Press the upper and lower case on the keyboard. The light is on, indicating that the graphics card, monitor, and other hardware are faulty.

2. If the keyboard light does not light up, it means that it is a memory, CPU, motherboard, or power supply problem.

Solution: 1. If the keyboard light does not light up, first wipe the memory module with an eraser, and check whether the gold finger of the memory module has any burnt marks. Replace the memory in the slot.

2. Check the capacitors and resistors on the motherboard to see if the capacitors are bulging, whether there is a burning smell on the motherboard, and clean up the dust on the motherboard.

3. Remove the CPU fan, power on and turn on, test whether the CPU has a temperature change by hand, if not, the CPU is not working, either the motherboard is broken, or the CPU is not plugged in properly, and the CPU is re-plugged.

4. Power supply problem, although the power supply is powered on, but the motherboard can not work normally, replace the power supply and try it.

5. If the display card is loose or oxidized, the keyboard light will be on, the screen will not be displayed, wipe the gold finger of the graphics card with an eraser, and check whether the capacitance on the graphics card is bulging.

6. Minimize the test method, only leave the power supply, motherboard, CPU, memory, graphics card, keyboard, monitor, unplug all the wires on the rest of the motherboard, use a screw knife to short the switch pins, if normal, add the rest of the hardware, piece by piece, until the cause of the problem is found.

Summary. Dear <>, the computer can't be turned on if the power cord is not lit up. May there be the following1

Is the power cord faulty: The power cord is not in good contact, reconnect the original power cord or replace the power cord and try again. 2.

Is the battery fault: If the laptop is in an external battery, unplug the power adapter, remove the battery, leave the laptop for 10-20 minutes, and then connect the power adapter and start again. 3.

Damaged power adapter: If the power adapter is damaged and the laptop cannot be powered on, you can use a multimeter to directly measure whether the power supply has an effective voltage output or replace the power adapter. Pro-<>

The computer is plugged in and the power cord is not lit and it can't be turned on.

Dear <>, the computer can't be turned on if the power cord is not lit up. May there be the following1Is the power cord faulty:

If the contact of the power cord is not good, reconnect the original power cable or replace the power cord and try again. 2.It's a battery failure:

If the laptop is in an external battery, unplug the power adapter, remove the battery, and leave the laptop for 10-20 minutes, then connect the power adapter and start again. 3.Damaged power adapter:

If the power adapter is damaged and the laptop cannot be powered, you can use a multimeter to directly measure whether the power supply has an effective voltage output or replace the power adapter. Pro-<>

<> what if the power light is on but it still won't turn on?

Dear <>, hello The power light is on, if the computer is not turned on, you can check whether the computer battery is charged, and then see if the plug of the power supply is plugged in, and then see if the power light of the computer is on.

It's all plugged in, the power light is on, but it still won't turn on.

Dear <>, hello It's all plugged in, the power light is on but it still can't be turned on, it's the damage to the power adapter or battery.

Why can't I turn on my laptop, the charging cable is no problem with other computers, and this one doesn't respond when plugged in.

Hello, dear! If your computer won't turn on, you can try the following steps:1

Check the power plug: Check whether the power plug is plugged in tightly, and whether the plug and socket are damaged. 2.

Check the battery: If it's a laptop, try removing and reinstalling the battery, or plugging it in with a power adapter. 3.

Check the power adapter: If it's a laptop, you can unplug the adapter and reconnect it, or try charging it with a different adapter. 4.

Check for hardware problems: If none of the above methods can solve the problem, it may be a hardware problem that prevents the computer from booting, such as a loose memory module or a faulty hard disk. It is recommended to contact professional technical support personnel for inspection and repair.

If none of the above methods solve the problem, it is recommended to contact professional technical support personnel for inspection and repair.