Laptop power button lights up and then goes off

The notebook is connected to the power supply. After pressing the power button, the indicator light turns on and then goes out. The computer cannot be turned on. What's going on...

1. Press Hold the power switch for four seconds to turn off the power, then turn it back on to check whether it starts normally. Check whether the external CRT monitor displays normally. Check whether the memory is plugged in securely. Clear CMOS information. Try replacing the memory, CPU, and charging board. Repair laptop motherboard.

2. Analysis: \x0d\x0a If the host indicator light is on or off, the screen is not powered on (the power indicator light is not on) or powered on but has no signal or "no sighal" is displayed. The former means that the power supply is not working. Or the connection is in poor contact. The latter is usually caused by poor contact in the memory module or damaged graphics card.

3. When the chassis is turned on, check whether all the fans are running normally after the power is turned on. The computer may also encounter overheating problems. If your monitor is working fine, but the hard drive is not booting and the display is not showing any images (or you can see an image but the computer fails to boot through the self-test), consider resetting the CMOS.

4. Excessive use of the notebook or excessive use of the battery on standby for a long time may cause insufficient power in the notebook power supply. It is recommended to charge more before use to solve this problem. The hardware is loose or the notebook is flooded, causing no response at startup.

The power button lights up and then goes off when the laptop is turned on

1. If the power button is pressed when the laptop is turned on and the indicator light lights up and then goes off, it may be one of the following reasons :Battery problem: This can happen if the battery is drained, or if the battery connection is bad. Try connecting the computer to the power adapter and then trying to turn it on.

2. Have you made any hardware changes recently (such as adding new memory) or connected external devices? If so, it is recommended that you restore the previous hardware configuration and disconnect all external devices to see if you can boot normally.

3. Remove the battery from the back of the notebook, connect it to the computer only with the power adapter, and try to turn it on. If it turns on normally, it may be caused by poor battery contact or battery failure. Only use the battery without connecting the power adapter, and if it turns on normally, then there should be a problem with the power adapter or a short circuit in the laptop power interface.

4. First remove all U disks connected to the USB interface. Then press and hold the power button for about 30 seconds. Plug in the external power supply (do not plug in the computer battery at this time). Wait for more than ten seconds and then press the power button to turn it on. If nothing happens, unplug the power adapter, install the battery and press the power button to turn it on.

5. If the laptop cannot be turned on (cannot be turned on without turning it on), the problem may be caused by static electricity on the motherboard. For this situation, follow the steps below. (1) Please plug and unplug the adapter and battery.

6. If the voltage is unstable, please confirm that the voltage is sufficient and stable when connected to the power supply, and there is no bad contact. You can unplug the battery to see if the power supply is not connected properly. If it is unplugged, it will not work at all. The measurement means that the power supply is not working at all.

What to do if the power indicator light of the laptop turns on and then goes off

Remove the battery on the back of the laptop, connect the computer to the power adapter only, and try to turn it on. If it turns on normally, then the battery contact is poor. Or caused by battery failure. Only use the battery without connecting the power adapter, and if it turns on normally, then there should be a problem with the power adapter or a short circuit in the laptop power interface.

Memory failure: If the memory fails, it may also cause the computer to fail to boot normally. Try to re-plug or replace the memory module to see if it can boot normally. Other hardware failures: In addition to memory failures, other hardware failures may also cause the computer to fail to boot normally. For example, hard drive failure, motherboard failure, etc.

Have you made any hardware changes recently (such as adding new memory) or connected external devices? If so, it is recommended that you restore the previous hardware configuration and disconnect all external devices to see if you can boot normally.

There are probably three main reasons: The voltage is unstable. If the power supply is connected, please confirm that the voltage is sufficient and stable, and there is no bad contact. You can unplug the battery to see if the power supply is not connected properly. If it is unplugged, If it doesn't work at all, it means the power supply is not working at all.

If your HP laptop's power light goes off within 10 seconds of turning it on, it could be due to one of the following reasons: Low battery: If your laptop is not plugged in This may happen if the battery is running on power but is running on battery power and the battery is very low.

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