The computer display lights up blue, shows no signal, and then turns yellow, and there is nothing.

Problem analysis: If the indicator light of the host is on or off, and the screen is powered on but there is no signal or "no sighal" is displayed, it is generally due to poor contact between the memory module or the display data cable, or the memory, graphics card, display, or data cable is damaged.

Handling suggestions:1If the monitor is powered on but no signal is displayed, turn off (if short pressing the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, plug in and unplug the memory module again, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn it on after installation.

If you don't know how to operate, then it's simple: slap or kick the chassis with a kick (note the location: the front of the shell on the left and right sides of the chassis that has no interface at the back; Attention Tract:

Don't push too hard). The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

2.If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, it means that the monitor is damaged and needs professional repair.

The computer is on? Loose memory module? The signal cable is not plugged in?

1.When the monitor does not receive a signal, the screen will go black and the indicator light will be orange. If there is a signal, it is usually green or blue.

2.So the problem is focused on the host.

3.Consider whether the graphics card is in poor contact. If it is an integrated graphics card, then it is necessary to consider whether the memory is not in good contact.

4.Consider whether the power supply is normal.

5.Consider motherboard failures. This one can only be sent for repair.

You look to see if the signal cable of the computer and the signal cable of the monitor are in good contact.

VGA signal cable (universal type), if it is loose, please tighten it.

1.The black screen of the mobile phone is one of the faults that are often encountered in the maintenance of mobile phones, and the black screen can be divided into two types: one is the black screen in use, and the other is the black screen in standby.

Here are some basic causes and solutions that cause black screens. 2.The black screen during use is mostly caused by third-party software downloaded by yourself, and this situation rarely occurs when the machine comes with it.

It can also be subdivided into two kinds: one is that the software itself has a problem, the software itself is unstable, or it does not match the mobile phone system, etc., this is very easy to solve, and it can be unloaded; The second is the conflict between the software and the software, which is a little more troublesome to solve, and requires a software to install and uninstall the software in an experiment. If you find it, uninstall it, and the problem will be solved.

3.Black screen in standby, let's talk about the standby principle first, straight board machine because most of them have a power-saving circuit design: the mobile phone can not detect the button for a long time, the trigger signal will automatically turn off the screen, that is, standby, when you need to use the mobile phone a button will activate the power-saving circuit, and then the screen lights up.

4.The reason for the black screen is often that the screen touches the electrical circuit delay reflected. That is to say, the mobile phone system has sent out the instruction to light up the screen, but because the circuit is delayed, it is not sent successfully, and the result is that the screen is not lit successfully, but the mobile phone system thinks that it has been lit, so it causes a black screen.

Your monitor button isn't on.

One; Caused by oxidation of the computer's memory module, or graphics card cheat. Two; Caused by damage to the computer's motherboard, or CPU and other hardware. Three; Caused by damage to the display or signal cable.

Why does the computer host keep turning on yellow and showing no signal?

The monitor keeps on yellow, indicating that there is no signal. Check the line first, if there is no problem with the line, it is a problem with the host, and the host is not running normally. The display does not show the workaround:

1. Check the power supply, socket, power cord and other wiring, if the power supply, socket can be used normally and the wiring is OK, connect the connection wire and lock it tightly.

Summary. 1. When the monitor does not receive a signal, the screen will be black and the indicator light will be orange. If there is a signal, it is usually green or blue.

2. So the problem is focused on the host.

3. Consider whether the graphics card is in poor contact. If it is an integrated graphics card, then it is necessary to consider whether the memory is not in good contact.

What is the reason why the computer shows no signal, black screen, and the indicator light shows orange?

1. When the monitor does not receive a signal, the screen will be black and the indicator light will be orange. If there is a signal, it is usually green or blue. 2. So the problem is focused on the host.

3. Consider whether the graphics card is in poor contact. If it is an integrated graphics card, then it is necessary to consider whether the memory is not in good contact.

4. Consider whether the power supply is normal. 5. Consider motherboard failure. This one can only be sent for repair.

Check whether the graphics card is loose, the cable is loose, whether the memory is plugged in, reseat the memory, if it still can't be turned on, then remove the motherboard memory battery for 5 minutes, let the motherboard discharge, after the discharge is completed, the battery will be put back in place, restart, if it still can't be turned on, it is recommended to send it to the repair point for repair.

The display lights up yellow is caused by an error in the MCU program inside the display General maintenance requires the writing board of the monitor driver board and the program of the board and the program of the board and improper operation It is easy to burn out the chip Not a professional maintenance personnel do not recommend maintenance The monitor is under warranty The maintenance is free of money The maintenance ** is about 50-100 Different from place to place**.

In the end, it's a matter of **