Optoma Projector No Signal — How to Fix It

What Does This Error Mean?

Optoma projector No Signal means the selected input is receiving no video. Check the correct input is selected, the cable is firmly connected, and the source device is on and actively outputting video.

How to Fix It

Check the source device is on and active
Select the correct input on the projector
Reseat the HDMI or VGA cable
Enable external display on a laptop
Try a different cable and port
Set source resolution to 1080p 60Hz

Frequently Asked Questions

Optoma projector No Signal after a firmware update on the source device?

Firmware updates can change display output defaults. On the updated device, manually re-enable external display output via display settings or using Win + P on Windows.

Optoma projector No Signal from HDMI but works via VGA?

This confirms the HDMI cable or HDMI port is the issue. Try a different HDMI cable and a different HDMI port on the source device. If both fail, the projector HDMI port may need servicing.

Optoma projector audio plays but screen shows No Signal?

If audio is present but no video, the video portion of the HDMI connection has failed while the audio continues. Replace the HDMI cable — it has likely developed a partial fault.