The "Dead Pixel Tester (Chromecast)" app is a tool that will test the video output of a device such as a TV, monitor, or gaming console, to see if it has any dead pixels or other problems that could affect the quality of the display.

The app will scan the display for dead pixels and show you a list of them, along with the reason why they might be dead.

You can use the app to test all of the displays in your house, including all of the TVs and computer monitors, and it will work with any display that is connected to the Internet.

You will need to make sure that the device you are testing is connected to the Internet, and it will work with any device that is connected to the Internet.

You will need to download the app and install it on the device you want to test.