What is the reason for the projection of a lot of small dots on the projection screen

Solution: 1. Use the computer to open the PPT software, and create five pages respectively, red background, blue background, green background, white background, and black background.

2. This is a small dot on the screen of the test projector, what is the reason? The projector has been used for a period of time, due to the different projection environment, the amount of dust on the imaging parts in the machine is different, and there will be a little bit of it in the later stage.

3. Adjust the projector lens to the least clear state, that is, the lens size, adjust to the maximum, and adjust the focus to the minimum. Connect the computer to display those few ppt, and you can see the small dots on the surface of the projection screen. This is where the projector imaging parts are cleaned.

4. The LCD machine should clean the red, green and blue three LCD pieces, and the digital machine should clean the DMD sheet.

The small white dot is that the new product is broken, dmd

Hello dear, I'm happy to answer for you, [big red flower Wu Yan] dear, the reason why the projector has small black dots: 1If there are irregular black spots in the state that the lens is also adjusted to the clear image, it must be that the LCD screen of the projector imaging LCD screen is stuck with dust, so it is projected.

2,。If the black dots are very clear in the blurred state of the image, it means that there is dust on the Philippine mirror inside the optical machine. I used to design and develop projectors.

Take out the LCD screen and wipe it with a soft cloth. It is possible that the DMD chip is broken, and the DMD can only be replaced. Thank you for your consultation, I hope this service can help you, you can click on my avatar to follow me, and if you have any questions in the future, you can consult me again.

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The screen projected behind the projector is very small because many projectors are 1024 768 resolution, and the older ones are still 800 600, and if you set it to expansion or copy mode, the computer screen will become smaller. 1. There is no input signal in the RGB port of the projector: 1. LCD screen output, VGA port has no output, this is the default way, and the reason for power saving may be considered.

2. VGA port output, no output on the screen. 3. Both the VGA port and the screen have outputs, so the computer must switch to the third output mode. Second, the projector has information input but no image:

Reduce these two parameters through the computer's monitor adapter, the general resolution does not exceed 600 800, and the refresh rate is between 60 75hz, please refer to the projector manual. Also, the monitor adapter may not be adjusted, please reinstall the original graphics card driver after adjustment. 3. The color of the projection image is skewed:

This is mainly an issue with the VGA cable. Check whether the interface between the VGA cable and the computer and projector is tightened. If the problem persists, buy a better quality VGA cable and pay attention to the port type.

Because the resolution is too small, just adjust the resolution on the computer. Here's how:

1.According to the different types of projectors, there are generally two interfaces that are mainly connected to the projector, one is VGA, and the other is HDMI. Let's see if it's the kind that connects directly to the computer.

2.Right-click on the desktop and select the screen resolution.

3.In the window that opens, select Connect to projector.

4.After connecting the projector, the mode is generally selected by default to copy, that is, the content displayed on the computer and the projector is the same. If not, you can manually select Copy.

5.Click on the resolution, make a selection and adjust it.

1.Use time: Using the projector for a long time will cause the internal temperature of the projector to rise, and the DMD display chip will be continuously affected by high temperature, and the internal driver will be damaged due to high temperature, and the pixel will become a white spot when the micromirror is in a flat plane when the driver burns out.

2.Make the mind quietly use the environment: The environment of using the projector is best not in a high temperature environment or humid environment, because the DMD display chip itself is very fragile, affected by the temperature and humidity of the outside, it is very easy to rise and widen and be damaged.

3.Internal hardware:Home smart projector due to the built-in system,Therefore, the internal components are more complex,Over time,There will be aging,A little change in current is noisy,It is easy to burn the driver in the DMD display chip,Resulting in white spots。

Hello dear, I am happy to serve you, if the black spot is very clear in the state of blurred image, it is dust on the Philippine mirror inside the optical machine. I used to design and develop projectors. Take out the LCD screen and wipe it clean with a soft cloth.

It is possible that the DMD chip is broken, and the DMD can only be replaced. It is the projector display screen that is yellowed, used for too long, enough heat is not dissipated, it will be yellowed display or partial mold, when this phenomenon occurs, quickly shut down, and then turn on the work after the machine dissipates heat. It may be that the filter is broken, causing dust to enter.

Chang has something in front of the bulb, and then it is projected, and there is a small black dot. There is a problem with the projector's bulb, in this case, it is best to keep it closed, and it is recommended that you go to the after-sales service or maintenance location to repair it. Apply a non-abrasive lens cleaner to a soft, portable dry cloth and be careful not to use too much detergent, as abrasive cleaning liquids, solvents, or other abrasive chemical solvents can damage the lens and should not be used.

Summary. Hello, I am happy to answer for you, I hope it will be helpful to you<>

After the laptop is connected to the projector, the computer screen becomes smaller, and the projector screen normally only displays a small part in the middle of the computer screen, which is usually caused by the mismatch between the resolution of the computer and the projector. Here are some possible solutions:1

Adjust your computer's resolution: Open your computer's control panel, tap on the "Display" option, and adjust the resolution to match your projector. 2.

Adjust your projector's resolution: In your projector's settings, find the Resolution option and select the resolution that matches your computer (usually the maximum of your computer's resolution). 3.

Check the cable connections: Sometimes, connection issues can also cause such problems. Make sure the cable is securely connected and that the correct connection port and cable type (e.g., HDMI, VGA, etc.) are being used.

4.Reinstall the graphics driver: This is not common, but there may be times when the graphics driver has a problem and the projector is not displaying the computer screen properly.

You can try reinstalling the latest version of the graphics driver to resolve the issue.

After the laptop is connected to the projector, the computer screen becomes smaller, and the projector screen normally only shows a small part in the middle of the computer screen. How to fix it?

Hello, I am happy to answer for you, I hope it will be helpful to you<>

After the laptop is connected to the projector, the computer screen becomes smaller, and the projector screen normally only displays a small part in the middle of the computer screen, which is usually caused by the mismatch between the resolution of the computer and the projector. Here are some possible solutions:1

Adjust your computer's resolution: Open your computer's control panel, click on the "Display" option, and adjust the resolution to match the resolution of your projector. 2.

Adjust the resolution of your projector: In your projector's settings, find the Resolution option and select the resolution that matches your computer (usually the maximum of your computer's resolution). 3.

Check the cable connections: Sometimes, connection issues can also cause such problems. Make sure the cable connection is secure, and make sure that you are using the correct connection port and cable type (e.g. retarding such as HDMI, VGA, etc.).

4.Reinstall the graphics driver: This is not common, but there may be times when the graphics driver has a problem and the projector is not displaying the computer screen properly.

You can try reinstalling the latest version of the graphics driver to resolve the issue.

The following is a related expansion, I hope it will be helpful to you [Flowers] <>

If none of the above solutions solve the problem, you can try to replace the projector or contact Zheng He, the manufacturer of the electric shouting number of brains, for technical support. <>