How to Fix an Epson Projector With Red Lines on the Screen

Some videos produce an interlaced output on projectors, which entails compressing a full image into stored even and odd scan lines. A projector then takes the interlaced output and converts it into a stream of progressive frames, or the finished image. A typical file output that involves interlacing is MPEG2; the process of de-interlacing turns it into a progressive MPEG4 stream. The appearance of lines sometimes indicates an issue with the original video output or the projector's de-interlacing processes.

The video de-interlacing process on an Epson projector may sometimes need to be "cleaned," much like an old-fashioned VHS player. Use the "Tracking" button on the remote control or from the control panel, as this often removes the lines and fixes any de-interlacing issues. If this doesn't work, go to "Signal," and then turn on "Auto." This setting automatically detects the type of input device the projector displays video for, and adjusts how the device interprets video signals.

Checking the input cables entails two steps: ensuring all video cables are fully seated, and manually setting the projector's display signal. Unplug all video cables, including HDMI and VGA, from the back of your projector, and then reconnect each cable in succession and see whether the vertical lines disappear. If they don't, navigate to the "Signal" setting in the control panel, and then manually pick the video input type.

When all else fails, Epson's customer support department is a veritable fountain of information in possible troubleshooting (see Resources). Should they have no further suggestions for personally repairing the device, they make accommodations for shipping your projector to one of their in-house or certified repair centers.