TV turns on but the screen stays black: a lit power indicator with no picture can be an input problem, a failed HDMI path, a backlight/display fault or a device that never finished starting. Separate on-screen menus from external video first.
Differential
Likely causes of “TV turns on but the screen stays black”, and how to tell them apart
- 1
The wrong input is selected or the source is not sending video
What separates it The power light is on and the screen is black, and the menu appears when you press the TV's own menu key.
How to confirm Press the TV menu or volume key in a dark room and look for any overlay.
- 2
An HDMI cable or port failure
What separates it The TV menu works but every HDMI source is black, and a different cable or port shows a picture.
How to confirm Disconnect every HDMI device and test one known-good source and cable.
- 3
The backlight or the display has failed
What separates it There is sound but no picture or menu, and a faint image is visible with a flashlight.
How to confirm Shine a flashlight close to the screen in a dark room and look for a faint picture.
- 4
The TV has not finished starting
What separates it The screen stays black for a long time after power-on and the logo never appears.
How to confirm Wait a few minutes and then perform a full power reset.
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether any menu, logo or faint image appears when the TV's own buttons are pressed.
- Whether the TV's built-in home screen or apps display.
- The devices and cables connected and which input is selected.
Try in this order
0 of 4 completedCapture the exact symptom
ReversiblePress the TV menu or volume key in a dark room and look for any overlay or faint image.
Run the smallest isolation test
ReversibleDisconnect every HDMI device and test the TV home screen, then test one known-good source and cable on one input.
Correct only the proven cause
ReversibleCorrect the selected input or cable only if the TV menu itself is visible; a missing menu or faint flashlight image points to TV hardware.
Verify before changing anything else
ReversibleConfirm the TV menu and one direct HDMI source remain visible after a full restart.
Stop boundary
When this stops being a self-service repair
- !Correct the input or cable only if the TV's own menu is visible; a missing menu or a faint image under a flashlight is a service matter.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
The TV power light is on but the screen is black. What should I check first?+
Press the TV's own menu or volume button and look closely in a dark room. If the menu appears, the fault is the input or a cable. If nothing appears, it is likely the backlight or a board.
Why is the screen black when the TV is on?+
The backlight, the source or the display panel may be at fault.
Could the TV be in standby?+
Check the power light and remote.