Problems With Blinking Screens in Projectors

By Gemma Craig

All digital projectors are prone to blinking screen issues.
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A blinking projector screen is, at best, a minor annoyance, and, more often than not, a complete distraction that makes it hard for viewers to focus on the content of your presentation. The flickering and blinking, if not fixed, could progress into a complete lack of video, which could be detrimental if it happens during an important meeting and it will convey a sense of unprofessionalism. However, a projected screen that blinks and flickers can often be fixed within minutes using basic troubleshooting techniques.

Determine if the blinking screen is part of the projector's normal function by observing when it happens and if it stops after a short period of time. If, for example, the screen blinks a few times after the mode has been changed and then the blinking stops, this could be normal for your projector. Consult with your projector's manual if you are uncertain.

Check the video connections on both the projector and the device to which it is connected, such as a laptop or tablet. If the video cable is loose, the screen may flicker and blink due to an incomplete connection, which causes a broken video feed. Press each end of the video cable firmly into their respective ports to ensure that the connections are solid.

Connect a new video cable to the projector if the problem continues; the current video cable may be damaged with a broken wire or missing pin. If the problem stops after testing a new video cable, discard the old cable.

Connect the projector to a different input device, such as a different computer. The graphics card in the device to which the projector is currently connected may be faulty or insufficient for properly displaying the video feed.


If the problem persists, consider taking the projector to a service shop or sending it to the manufacturer for inspection if it is under warranty. A technician will be able to tell you if something is wrong with the projector.