Troubleshooting - My Projector

Modified on Thu, 25 Jan 2024 at 10:25 AM

This article provides some advice in the instance that your projector is not working. You can try these suggestions which may get your projector working before the technician can reach you.

There are common problems when a projector is not working these are shown below, with each problem there are a few troubleshooting tips.

- No Power

- Overheating

- Unresponsive projector

- Lamp has died

- Projector is on but it is just a blank screen - No input

- Image appearing green/yellow

No Power

Your projector may not be switching on because the power source/plug is set to off. You can tell if the projector has no power going into it, because all of the lights on the projector are off and it would be completely unresponsive when trying to switch it on. (No fan sounds or movement)

- Please check your projector is plugged in and the power source is set to on.

- Some classrooms have a separate switch for the projector power within the room, ensure this has not been switched off.

- Possibly, your projector power plug has been put on a different fuse and this has been tripped. (Your caretaker may need to check this)

- Ensure the power lead has been firmly plugged into the back of the projector.

If these have all been checked, then your projector most likely will need to be replaced as it is an internal hardware issue.


Your projector may be overheating, this is usually where you are able to switch the projector on and it may be issuing a warning for overheating displayed on the screen or sometimes as a "heat" status light on the projector. If neither are showing, it could still be overheating. Most projectors have an accessible filter which once cleaned, allows the projector to breathe. It is quite often located on the side of the projector with two clips.

- Unclip the projector filter and try to remove the dust from it gently without ripping the filter.

- If possible get a vacuum to suck the dust from the filter, also hold the vacuum up to the projector to suck the dust from within it. 

- Afterwards, you may need to restart your projector by removing and refitting the plug in the back.

Unresponsive projector

Your projector may appear unresponsive and not turning on. This may be because the controller batteries are dead and need to be replaced. You can tell if they are by manually switching the projector on by the On/Off button on the projector. As if the on/off button works then the projector is responding it is just the controller.

Lamp has died

Usually where a lamp has died, the projector will indicate by showing a lamp light on it or might even show a very brief message when trying to turn on the projector. If you turn on your projector and can hear fans but no image, where you have checked the filter (in case of overheating) but still no image then your lamp has died. We will need to order a replacement lamp through our procurement team. If you can send through the projector make and model (we also accept photos of the projector to be 100% sure it is that make and model), usually found on the bottom of the projector we can look to order this ready for when the technician visits.

Projector is on but it is just a blank screen - No input

If your projector is on but it is just a blank screen then it does not have an input of visual going into it. Please try the following:

- Use your controller and press the "input" or "source" button to cycle through the inputs as it may not be set to the correct one. 

- Your PC may not be duplicating its screen, press Windows key + P on your keyboard and select duplicate to duplicate your screen to the projector.

- Check the cabling, see the "Image appearing yellow/green below" as it is the same steps.

Image appearing yellow/green

If your image is appearing yellow/green then this could be the cause of a faulty port (PC side, projector side or wall port), splitter or cable (HDMI, VGA)

- Ensure that all cables are secured properly as loose cables can cause problems.

- Look for any visible damage.

After checking these, the technician may need to replace cables or ports themselves. It could be a computer driver issue potentially which your technician will need to look at.

Below are some images of cables and splitters to help you identify them:

Any problems or questions please contact

HDMI Cable

HDMI Cable

VGA Cable

VGA Splitter


HDMI Splitter

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