To test this theory, take a flashlight and shine it directly against the screen at a sharp angle in a dark room. You should verify that the HDMI cable is securely seated at both ends—the television set and the streaming box or game console.
HDMI Connection and Signal Source Troubleshooting
A faint humming noise indicates that the internal components are receiving power, while a silent standby often points to a different issue entirely. Signal Source Verification Most frequently, the problem originates not with the TV itself, but with the external devices feeding it content.
You should perform a hard reset by unplugging the television from the wall outlet for a full minute. If you can faintly see a picture, the backlight is the component requiring attention.
Fixing HDMI Connection Problems Causing No Picture
A T-Con (Timing Control) board malfunction is a common reason for a smart TV to turn on with no picture, as this board manages the signal distribution to the screen. You walk into the room, press the remote, and the smart TV turns on but no picture appears.
More About Smart tv turns on but no picture
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