Without a display, the LCD screen is not displayed?

There is a difference, but not much.

The main difference is: the monitor without a power adapter has the power supply part inside, which is an AC input cable, which looks neat. On the other hand, for a monitor with a power adapter, the power supply is external, and the temperature emitted by the power supply is outside the machine, and the temperature inside the machine is reduced. Each has its own benefits.

As for starting the speaker and refrigerator to cause the monitor to go black, it has nothing to do with whether the monitor comes with or without a power adapter. Neither the speaker nor the refrigerator are high-power appliances, and when they are started, they cause a wide range of AC fluctuations, which is extremely abnormal. It is advisable to check several aspects:

1. Whether the mains voltage is normal.

2. Whether the contact of the main switch is defective.

3. Whether the power supply wire diameter is too small.

4. Focus on checking the power socket wire connected to the computer, speaker, and display, some low-quality power junction boxes, and very few copper wires of the connecting wire, and the voltage drop of an electrical appliance is very large, and the heat is great.

5. Pay attention to the connection socket between the following monitor and the power adapter, the input voltage is low, but the current is large, and it is easy to have poor contact.

Here are a few ways to solve the problem of ghosting of computer LCD monitors:

1. Install the graphics card driver of the computer correctly to avoid the problem of monitor ghosting.

2. Adjust the resolution of the display to your needs, and then adjust some parameters of the display to the best (some monitors have an automatic adjustment function, which can be fine-tuned automatically after that.) ), and then adjust the refresh rate. Generally speaking, the higher the refresh rate, the lower the flicker.

It depends on what frequencies your display can support. Excessively high frequencies may reduce the life of the display.

3. If a TV box is installed between the LCD monitor and the host, it may also cause ghosting, you can try to remove the TV box first.

4. It may also be that the data cable of the LCD monitor is loose and causes the monitor to ghost, try to unplug it and plug it back in.

5. If the LCD monitor, host or data cable is too close to the socket or high-power electrical appliances, it may also be subject to electromagnetic interference, resulting in ghosting.

In addition to the display itself, there is also a possibility that there is a problem with the cable.

You can change the line of the screen that is not displayed to see,If it is replaced, it is a problem with the connection,If it is still not good, it is a problem with the screen itself,You can ask them to help you solve this problem。

It is estimated that the components inside are broken, and the specific ones should be taken by the maintenance personnel. Sometimes, the LCD screen is broken, and this happens. You check the instructions first, and if you can solve it yourself, it's best, otherwise you can only repair it.

Generally, there are three situations.

1.The graphics card is in poor contact with the display signal cable, so you can reinstall it.

2.The monitor itself is faulty, and this one needs to be replaced.

Then you have to see if the display cable is not connected well, or the cable is broken, or other reasons, you can change the display screen to another host to try it.

1.The line didn't connect.

2.Bad graphics card.

3.The monitor is broken.

If there is a "no signal" on the screen, it does not mean that the monitor is faulty, and the possible faulty parts and parts are:

1. Graphics card; 2. The power supply circuit of the graphics card, that is, the onboard power circuit on the motherboard, is faulty;

3. Poor data cable characteristics, such as short circuit or open circuit, or poor plugging with graphics card and display;

The landlord is requested to check by himself according to the actual situation.

The monitor can display the self-test content during the POST and the chassis after the black screen of the monitor is displayed normally, which means that your connection, the monitor, and the host are all normal!

1. When you enter the system, do you see the boot interface of Windows, otherwise repair the system.

2. Have you installed dual graphics cards (such as if you have an on-board graphics card and installed a discrete graphics card), and then you installed the monitor on the on-board graphics card, then the display will appear the phenomenon you described, and most of this phenomenon is caused by this.

Send it for repair, the monitor is faulty.

Problems with the graphics card. If the landlord has an integrated graphics card, you can try to change the monitor to another computer, which can eliminate the problem of contact between the monitor and the data cable. Once the display is removed, you can attach a discrete graphics card to your computer.

If it's a discrete graphics card, you can also borrow a graphics card or install your graphics card on another computer to try it out. In this way, the problem can be quickly identified and the problem can be eliminated by disassembling and disassembling the fault.

If it is a discrete graphics card, you can use an eraser to wipe the gold finger from the disassembled and assembled center, and the row below the graphics card has gold-plated pins on both sides.

Carefully observe the area around the graphics card slot on the motherboard and observe whether the capacitor is bulging and bursting if the graphics card is on, and if it is an integrated graphics card, observe whether the capacitors near the video memory and near the south bridge are bulging and bursting.

Mainly unplug and re-check whether the monitor and the host are connected normally, if possible, change to a working computer to try whether there is a problem with the monitor, if you confirm that there is no problem with the monitor or there is no spare computer to test, then mainly look at the graphics card connection and memory module, if you check the memory module, it is likely to be a problem with the connection of the graphics card, or change a checked memory module to try, please refer to the host boot sound:

1 short beep: Memory refresh failed.

2 short beeps: Memory ECC verification error.

3 short beeps: The self-test of the system basic memory (the first 64KB capacity) fails.

4 short beeps: The system clock is wrong.

5 short beeps: CPU error.

6 short beeps: Keyboard controller error.

7 short beeps: The real mode of the system is wrong and cannot enter the protection mode.

8 short beeps: Displays a memory error (e.g. displays memory corruption).

9 short beeps: Motherboard FlashROM or EPROM verification error (e.g. BIOS corrupted by CIH virus).

1 long and 3 short beeps: memory error (e.g. memory chip corruption).

1. Long and 8 short beeps: The display system is tested incorrectly (such as poor contact of the display data cable or graphics card).

If it's an award bios

1 short beep: The system starts normally.

2 short beeps: General error. You should go to CMOSTathe and reset the incorrect options.

1 long beep 1 short beep: There is an error in the memory or motherboard.

1 long beep 2 short beep: Wrong monitor or graphics card.

1 long beep and 3 short beeps: The keyboard controller is wrong.

1 long beep 9 short beeps: motherboard flashram or EPROM error (e.g. BIOS corrupted by CIH).

Non-stop long beep: The memory is not plugged in properly or the chip is damaged.

Non-stop ringing: The display is not connected to the graphics card.

Repeating a short "beep": The power supply is faulty.

No beep sound and no display: The motherboard power supply is not connected, or the power supply is damaged.

It's possible that the monitor has been sitting for too long and has been damp... When your computer is turned off, you can use a hair dryer or a fan to blow it, and I have had a similar situation on my computer...

Take the battery out and try it.

1. First of all, we conduct a comprehensive check on the connection between the computer monitor and the host, and plug each connection back to see if there is a connection problem.

2. If the fault still exists, then we need to open the chassis to see if the chassis contains metals and other substances, causing a short circuit in the computer host circuit, and then we smell the computer to see if there is a burning smell, and see if there are damaged components around the motherboard and around the CPU.

3. After checking the whole chassis, there is no abnormality in the chassis, then we will dust the chassis.

4. If it can't be turned on, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device.

5. If the fault still exists, it is likely to be the fault of the memory card, graphics card, CPU, motherboard, etc., at this time, we only need to plug and unplug these hardware, or replace it again, and try to find the cause one by one.

6. If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

7. When the computer is turned on and started, the system BIOS starts to POST (power-on self-test), and when a fatal error is detected in a device in the computer, it will control the speaker to send out a sound to report the error. Therefore, there may be a fault that the power is turned on without displaying an alarm sound. If the computer is turned on and there is no alarm sound, the fault can be checked according to the meaning of the BIOS alarm sound to check the faulty device to eliminate the fault.

First, check if it's a cable problem after checking that the monitor switch is turned on. Is the power cord of the monitor plugged in, whether the interfaces at both ends are locked, and whether there is a problem. After there is no problem with either of these, check whether it is a problem with the data transmission line, sometimes you can clearly see that there is a problem with the connector of the transmission line, if you can't see it with the naked eye, you can replace the cable or use other interfaces and cable types to try.

The power cord is not plugged in, the display switch is not turned on, or there is a virus.

The monitor and the host unit are not properly connected.

The power supply is not plugged in, the display button is not turned on, the display is broken, and the screen is black.

1.Check that the monitor power cord is plugged in and powered on.

2.Turn on the display switch button.

3.Check whether the monitor is in poor contact with the host transmission line.

4.Go to the computer city to repair.