How to Fix Switch HDMI Issues: No Signal on TV

If your Switch isn’t sending a signal to your TV via HDMI, start by checking the HDMI cable. Use the official Nintendo HDMI cable or a high-speed HDMI 2.0 cable, as older cables may not support 4K or 1080p. Ensure the cable is firmly plugged into both the dock and the TV’s HDMI port. Try a different HDMI port on your TV—some ports may be faulty. Power cycle the dock and TV: unplug both for 30 seconds, then plug them back in. Check the dock’s HDMI settings: go to 'System Settings' > 'TV Settings' > 'TV Resolution' and select the correct resolution for your TV (1080p is standard). If using an HDMI adapter, ensure it’s compatible with the Switch and supports HDCP.