The reason why the computer power turns on and off repeatedly

The reason why the computer power supply turns on and off repeatedly:

1. Mainboard failure (such as: load is too high or too low, liquid short circuit, etc.);

2. The power supply part of the LCD screen or backlight board is short-circuited;

3. The computer power supply fails or the power is insufficient. This phenomenon occurs when the instantaneous power is large when the power is turned on and the power supply cannot keep up. If hardware has been added or upgraded recently, insufficient power supply may also occur.

4. Static interference;

5. The button or circuit of the switch board is faulty.

Recommended: Windows Tutorial

Solution:

1. Check the power adapter working indicator light (Note: only for notebooks);

(1) Check the power adapter working indicator light. Is it in a normal and steady state? As shown in the picture below:

# Reminder: Due to the EU green environmental certification standards, some adapters have canceled the design of the working indicator light, which is normal.

(2) If the indicator light flashes after being connected to the notebook, it means that the host has a short circuit. At this time, you need to contact the service station after powering off for further testing.

(3) If the indicator light is normal but goes out after pressing the host switch, there may be a problem with the load of the host. If there is no liquid entering, you can refer to step 2.

2. Release the residual charge test;

Disconnect the host from the 220V mains (note: the notebook needs to remove the battery at the same time), and then press the host switch 3 times continuously, each time Continue for 5 seconds. After the operation is completed, connect the battery alone and restart the test. Observe whether the fault is eliminated?

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