How to Fix Roku TV Not Working?

For problems like a black screen with sound, or no picture at all, investigate your inputs and display settings. Make sure your TV is on the correct HDMI input for the device you're trying to watch. Try cycling through all inputs using the "Input" or "Source" button on your TV remote. If you're using external devices, try connecting them to a different HDMI port on the TV or using a different HDMI cable altogether. If you can faintly see an image by shining a flashlight at the screen while the TV is on, it indicates a backlight failure, which typically requires professional repair or replacement.

How to Fix Roku TV Not Working