11 Projector Display Problems and Solutions

While operating a projector, there are a number of problems we can encounter. One of the most frustrating of these problems is display issues. Almost every display problem has its solution. Even the ones without a solution can be replaced entirely.

Projector display problems are issues we face that affect the viewing of the projected image. There is a possible solution for any display issue you have. Projector manuals may not be able to provide you with all the information you need on a particular problem. In an event like that, it does not mean there is no solution.

I have compiled a list of projector display problems you will likely face and their solutions. Read on to find these specific problems and how to go about them.

Projector Display Problems and Solutions

Projector Display Problems and Solutions

Image Not Filling The Whole Screen

There’s a chance the projected image won’t fill the entire projector screen. There may be several causes for this, including resolution differences between the computer and projector, resolution differences between the computer and Powerpoint, and resolution differences between the computer and projector. Note that the projector’s resolution cannot be altered. Therefore, altering the computer’s or Powerpoint’s resolution will be the simplest option.

Technical personnel can identify the problem and suggest a fix with the following procedures.

  • Make a note of whether the computer is connected through VGA or HDMI. In contrast to VGA, which could choose the incorrect resolution, HDMI often automatically chooses the proper computer resolution.
  • Make sure the projector is all the way zoomed out. There are situations when the projector zoom may have been accidentally changed.
  • When the projector initially powers on, a blue image will show; take note of its size. When zoomed out, this is the largest image size the projector can create. The projector has been physically moved too far or too near if neither height nor breadth is filled.
  • Verify the PowerPoint resolution and the computer resolution. The resolution of at least one of them must coincide with the projectors. What to expect both when the resolutions match and don’t match is described below.

Using a PC with a screen set to 4×3 resolution

The projected picture’s height and breadth must match the projector’s test image if it has a 4×3 resolution.

The projected picture will have the same width and height as the projector’s sample image if you are projecting a 4×3 resolution and have a 4×3 PowerPoint presentation running in full-screen mode.

The projected picture will have the same width as the projector’s test image but not the entire height if you are projecting at a 4×3 resolution but have a 16×9 PowerPoint presentation running in full-screen mode. Because the projector’s chip is made for a 4×3 picture and receives a 16×9 image via PowerPoint, it cannot fill the entire height.

Solution: Set the presentation’s page configuration to a 4×3 format. This could enlarge some of the presentation’s images. No simple automatic solution exists for it.

Also Read:

Does Curved Screen Projection Require a Special Projector?

On a 4×3, when the computer’s resolution is set to 16×9

The projected picture should be the same width as the projector’s blue test image if you use a 16×9 resolution. Due to the projector’s chip’s 4×3 picture architecture, it cannot occupy the entire height.

Solution: The resolution of the computer should be adjusted to match that of the projector.

Launching a 16×9 PowerPoint presentation in full-screen mode while projecting a 16×9 image will fill the width but not the height. The projector’s chip is made for a 4×3 image, but it receives a 16×9 image from PowerPoint and the computer, so it cannot fill the entire height.

Solution: To match the projector’s resolution, you must adjust both the computer’s and PowerPoint’s resolution. This could enlarge some of the presentation’s images.

When a 4×3 ppt is opened and projected at a 16×9 resolution, neither the height nor the width will be filled. The projector’s chip is made for a 4×3 picture, but it gets a 16×9 image from your computer. Therefore it cannot fill the entire projected image.

Solution: Adapt the resolution on your computer to that of the projector. The picture will fill the anticipated area’s width. You would also need to switch your PowerPoint resolution to a 4×3 format to fit the height. This could enlarge some of the presentation’s images.

Broken Lamp Produces No Image

The first thing to check and resolve is whether the wires are properly connected if the projector is turned on. However, it can lie with the lamp or lamp ballast if there are no issues with it. The lamp ballast unit powers the lamp. As a result, the lamp will likely not operate if the device isn’t functioning.

Solution: The light must be changed to solve this issue. Several types of lights are available at various pricing points, so you may choose one that fits your needs and price range to determine whether a light replacement is necessary.

There are Dots and Lines in The Projected Image

Dust accumulation and pixel issues in DLP projectors. Read on to find more details.

Pixel Issues in DLP Projectors

DMD chips are used in DLP projectors (DLP chips). Digital micro-mirror devices are DMD chips. Thousands of tiny mirrors make up the chips. To create a picture, light is reflected and refracted by the mirrors.

A projector’s pixel count correlates directly to its number of mirrors. The DLP projector is widely used. They have a lot of pixels, which results in high-quality photographs. No system, however, is faultless. Spots frequently appear on the projected screen with DLP projectors. When the DMD chip starts to deteriorate, spots start to show. The pixels degrade and cease to work correctly.

The projection screen’s spots can be either white or black. When pixels become locked in the on state, white patches develop.

Solution: The solution for this is to change the DMD chip. I recommend going to a service shop to have it fixed. If your projector is still under warranty, then you are in luck; you can have it serviced for free with your manufacturer.

Dust Accumulation

Dust frequently enters the projector through the vents. The vents assist the fans’ ability to draw in cold air. However, the air also brings dust particles with it. The fan could even assist in forcing the dust into every crevice of the projector. On the lamp, dust may obscure light in very small regions. As a result, a dot appears on the projector screen.


  • Allow the projector to cool for 30 minutes if you recently used it.
  • Remove the light cover by loosening the screws.
  • Pull the light out by loosening the screws holding it in place.
  • Don’t touch the glass; hold the light by the handle. It is easily broken and dangerous.
  • Clean the surface with compressed air from a can.
  • Reinstall the lamp and tighten the screw.


  • Dull Image On Screen

It only applies to LCD projectors in this circumstance. No matter the model, each projector has a specific light life. The visual quality also changes based on that. When the image deteriorates, it is time to change the light.

Solution: A few LCD projectors can tell you how many light hours are left and how many have already been consumed. You will need to calculate the usage time for others. When you recognize that it has seen enough use, it would be worthwhile to think about purchasing a new projector lamp.

Missing Desktop Icons

This problem may affect anyone, whether they are professional or not. Even if the icons are displayed on the laptop, there may be times when they are not visible on the projected screen. 

Solution: Selecting dual displays or dual display copies in place of the extended desktop is a standard troubleshooting step.

The projected Image Has a Low Quality

The original image quality may appear to be better than the projected image quality. Once more, this results from misaligned resolutions. However, more recent LCD projector models can now automatically match your computer’s resolution.

Solution: Manual intervention is necessary for projectors that do not automatically align the resolution. The projected visuals may be of higher quality as a result of this. The projector lens might be dirty, or it could be moist. A simple cleaning can resolve the problem. Also, you can try adjusting the projector’s distance from the screen to get a crisp and sharp image.

Projector is on But No Display

Even if you take all the necessary precautions to ensure that your projector operates smoothly, there may still be times when the display on your projector is not working.

Solution: Here are a few quick but frequently successful measures you may take to resolve the problem on your own.

  • The projector and connected device (for example, PC) must be switched on.
  • Check that the cords between your PC and the projector are securely linked.
  • Restart and turn on the devices.

These procedures are perfect for projectors with HDMI or VGA connections.

What Can Go Wrong With a Projector?

A lot can go wrong with a projector. Something is wrong with your projector if it is not operating the normal way it should. You can encounter display issues, power issues, motherboard issues, and many more. The best way is to check your device’s manual to see if there is a solution to your problem.

How Do I Reset My Projector?

The steps to restore your projector’s settings to factory settings can vary between brands. However, the procedure is similar:

  • On the remote control, press the Home button and go to settings.
  • Select Device Preferences.
  • Choose and select Reset.
  • Choose Reset and hit Enter.

Final Thoughts

Projectors have their issues, and display problems are one type of problem you can encounter while using the device. If you do not find the exact problem you are facing in this blog, you can check your projector’s manual or inquire from the manufacturer’s website, preferably a forum.

Sparingly, you will find other resources on the internet when you key in the description of the problem you are facing.


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