If your Cosmos Laser 4K Projector frequently shows a prompt of “To guarantee auto-keystone precision, clean the ToF sensors”, you can try the following solutions below to fix the problem and stop the prompt.

Nebula Cosmos Laser 4K Auto-Keystone Precision Prompt Troubleshooting

1. Update the firmware of the 4K dongle and Cosmos Laser 4K projector to the latest version.

System update: Press the Settings button on the remote and select Settings > Device Preferences > About > System Update.

Firmware update: Press the Settings button on the remote and select Settings > Device Preferences > About > Projector Firmware Update.

Nebula Cosmos Laser 4K

2. Remove any objects in front of the projector.

3. Place the projector 5-13 ft (1.5-4 m) away from your screen.

4. Press the Settings button on the projector or the Source button on the remote control, select Image Correction, and turn off the following features: Auto Keystone Correction after Move, Manual Keystone Correction, and Auto Screen Fit.

That’s all for the solutions and troubleshooting for Auto-Keystone Precision Prompt on Nebula Cosmos Laser 4K projector.

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