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.
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.
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.
Nebula Cosmos Laser 4K No Sound Troubleshooting and Solution
Nebula Cosmos Laser 4K Projector iPhone Screen Mirroring Guide
How to Update Firmware for Nebula Cosmos Laser 4K Projector?
Nebula Cosmos Laser 4K Projector Remote Control Pairing Method
How to Control Anker Nebula Cosmos Laser 4K with a Phone?
Anker Nebula Cosmos Laser 4K Projector Review