My home also has a power indicator light on, the screen is not on, can you repair it for me?

The power indicator is on, but the screen is not on, in this case, it is usually because of the problem of your current screen display, it is recommended that you check the screen and simply run it.

Hello, if your power indicator light is on and the screen is not on, it is recommended to take it to a repair shop to find a professional for repair.

You can contact their after-sales service directly, or go to a special place to repair this machine, and they will definitely repair your equipment.

Like you said, for example, the power indicator is on, but the screen is not on, then it is likely that there is a problem with the wiring, you can check the wiring first.

If your LED is on, but the screen doesn't, it may be because its CRT is damaged.

Is it a computer or a TV?

The power indicator does not light up, the screen does not light up, and there is no way to repair it on the Internet.

Go to a physical store. Go to a home appliance repair or computer repair shop.

In this case, you need to focus on checking the cable.

The reasons for the above failures are as follows:

(1) Power failure. This should be a very simple fault, the general LCD extension internal power supply and external power supply, the external one is more common. No matter what kind of power supply, its structure is much simpler than the power supply of CRT display, and the vulnerable ones are generally some small components, such as fuses, rectifier bridges, 300V filter capacitors, power switch tubes, power management ICs, rectifier output diodes, filter capacitors, etc.

2) The power regulator circuit of the driver board is faulty。If the circuit of the switching power supply fails, the two groups of power supplies may be no output, first check whether the 12V voltage is normal, and then check whether the 5V voltage is normal, because of the AD driver board. The working voltage of the MCU chip is 5V, so when finding the fault that cannot be turned on, first measure the 5V voltage with a multimeter, if there is no 5V voltage or the 5V voltage becomes very low, then there may be a problem with the input stage of the power supply circuit, that is to say, there is a problem with the power supply part of the 12V conversion to 5V, this fault is very common, check whether the stabilizer block is soldered or damaged.

Another possibility is that the load of 5V is heavier, and the 5V voltage is pulled very low, in other words, there is a problem with the signal processing circuit of the rear stage, and some circuits are damaged, causing the load to be heavier, and the 5V voltage is pulled very low.

(3) MCU failure. There are many reasons for this situation, on the one hand, the MCU's program is flushed out and may not boot up, and the MCU itself is damaged, for example, the MCU's IO port is damaged, so that the MCU can not scan the buttons, and when encountering this fault caused by the MCU, it is useless to find the problem of hardware, even if you change the MCU, you can't solve the problem, because the MCU needs to be programmed and coded, Unless you can buy an MCU with a program, it is often difficult to accept. Therefore, in most cases, it can only be replaced with a generic AD driver board.

What should I do if the power light of the computer monitor is on and the screen is not lit Hello dear, I will find out 1 for you, confirm whether the reset button on the host is stuck. 2. Check whether the signal cable of the display is connected to the host, whether it is connected well, and whether there is any wrong connection. 3. Turn on the power switch of the display, whether the power indicator of the display is not lit or flashing, and whether you can hear the sound of the host powering on normally.

4. Whether the contrast and brightness of the display are adjusted too low, and the automatic mode of the display is resumed. 5. Remove all external devices, including keyboard and mouse, leaving only the monitor cable, the screen is not bright, the display screen is bad, I hope it can help you, I wish you a happy life and good health!

Summary. Check the power supply of the monitor, when the monitor is not lit, check whether the power supply of the monitor is plugged in, if the power switch of the monitor is a touch switch, when the monitor is powered on, a slight sound should be heard"Crackling"sound, at this time, it can be judged that the switching power supply circuit of the display is good.

First check the power supply of the host, when the display is not lit up, the black screen has no image display, first check whether the host power is plugged in well, whether the fan of the power supply rotates normally, the power indicator on the host panel, the hard disk indicator is flashing or not, because if the host power supply does not work or the motherboard does not have power supply, the macro digger does not receive the signal, of course, there will be no image display.

Check the power supply of the display, when the display is not lit, check whether the power supply of the display car shouting is plugged in, if the power switch of the display and closure of the enlightener is a light touch switch, when the display is powered on, a slight sound should be heard"Crackling"sound, at this time, it can be judged that the switching power supply circuit of the display is good and fails.