No input signal

"No input signal" typically refers to a state where a device, such as a monitor or television, is unable to receive or detect a video signal from a connected source. This could be due to various reasons, including loose or damaged cables, incorrect input settings, or issues with the source device itself. To troubleshoot, check the connections, ensure the correct input source is selected, and verify that the source device is functioning properly. If the problem persists, it may indicate a hardware issue that requires further investigation.