1. Q: The computer or other device via HDMI failed to connect to the projector.
A: Check whether the input source is correctly connected, the wire is original and damage-free and there are no compatibility issues. If the HDMI interface has poor contact or is foreign to the projector, try changing the HDMI cable (HDMI converter (VGA to HDMI), or replace the converter).
2. Q: What do I do when the screen of the projector is black when connected via HDMI?