Choose the Correct SourceĪnother important thing often overlooked is changing the input source on TV. This way you can make sure if that specific device is having an issue or there is a problem with the TV itself. In most case, a simple restart will work without hassle.įurther, to narrow down the cause, you can try bringing another HDMI device and connect to your TV.

You can try restarting the TV as well as the HDMI device to see if it starts working again. Whenever you connect an HDMI device to your TV, it may not always work on the first attempt. Change Output Settings on Source Device.If none of these things solves your 'No HDMI Signal' issue, chances are there's something wrong with the cable or the devices' ports, meaning you'll need a replacement. So, if your outputting device gives you manual control over its display resolution, consider setting that to auto, or picking your TV's best resolution. This is a big problem for PCs, for example, since they're usually capable of outputting video in a wider variety of resolutions than an Apple TV or Roku would be. Most TVs are smart enough to adapt to any resolution within their capabilities, but some devices that send video to a TV can be annoying in that regard. If neither of those solves the problem, one final, common thing to try is to check resolution settings. In many cases, the order in which these devices are powered on will dictate the success of the handshake. This is an extremely common solution for people with HDMI sources connected to a home theater system or an audio/video receiver. So, if you turned on the display before your HDMI source, try turning both off and then powering them on in the opposite order. If that doesn't work, the next thing to consider is changing the boot sequence.

Hdmi from mac to tv not working