If your TV screen goes black, but there is sound, the issue is most likely related to your television backlight, faults in the driver circuit, or the T-CON board. Other issues like faulty HDMI cables, wrong input source, and problems in firmware also prevent the display output.
A few days back, I was watching football, and suddenly, my TV screen went black, but the audio was working correctly.
Initially, I thought there was some broadcasting issue, but the screen didn’t come even after a long wait.
Then I realized something was wrong with my TV screen. After a few minutes of troubleshooting, I found that the problem was with the TV backlight.
In this guide, I’ll explain what was the problem with my TV screen and how I fixed that. If your TV screen goes black, but the sound still works, this guide is for you.
Why Is My TV Screen Goes Black But Sound Still Works
I understand it’s a frustrating moment, and you want to fix the black screen on your TV, but you must first identify the culprit.
The common reasons for TV black screens are-
- Backlight malfunction
- Bad HDMI connector
- Wrong input source
- Faulty T-con board
- Faulty power circuit
These are five common reasons your TV screen is black, and no picture is displayed. In my case, a burnt LED on the backlight strip was the culprit.
What To Do If Your TV Screen Is Black But Has Sound
So, you know the common reasons why your TV screen is black, but it has sound. Let’s identify the culprit and fix the issue.
Follow these steps to fix black-screen televisions of any brand:
1. Power Cycle TV
If you ever face any issues with your television, the first troubleshooting you should do is to power cycle your TV.
This will fix all firmware and minor hardware glitches, and your TV will return to life. Most people often mistake it for rebooting, but the power cycle differs from restarting or rebooting.
Here are the correct steps to power cycle your TV:
- Unplug the power cord from the wall outlet.
- Detach all HDMI and USB devices from TV ports.
- Press and hold the TV power button for 30 seconds.
- Wait for the next 3 minutes to completely discharge the capacitors.
- Plug the power cord and press the power button to turn on the TV.
This process will completely drain the residual charges from capacitors in the circuit board, and your TV will start working again. If your TV has no power button, wait 5 minutes before re-plugging the power cord.
2. Replace HDMI Connectors
If you’ve plugged a Fire TV Stick or Android TV Box into the HDMI port, the problem may lie in the HDMI connectors.
Over time, the HDMI connectors degrade and are damaged from the inside due to heating. A damaged HDMI cable fails to send video data, and the TV screen turns black.
So, if your TV screen goes black but there is sound, then replace the HDMI connector. Also, clean the HDMI port regularly.
3. Change Input Source
Sometimes, we select the wrong input source, which results in a black screen with no picture. Next, check the input source of your TV and see if the black screen problem is fixed.
If you’ve tried everything above, but your problem is still unresolved, it requires some advanced troubleshooting.
If your TV is under warranty period, I advise you to contact your TV brand and claim the warranty. Because if you open any screws from the back cover, then the brand will reject your warranty claim.
4. Replace Backlights Strip
There is a higher chance that your LED TV’s backlight strips are faulty. In my case, the screen suddenly turned black while watching the football match, but the audio was working correctly.
So, it means the light source isn’t glowing in the back, which indicates the backlight isn’t working.
If you check with a flashlight at an angle, then you’ll see the picture is there, but it’s not visible due to the absence of light.
To fix this, you need to replace the backlight strip of your TV. I replaced the backlight strips, and my TV display is working again.
Here are steps to replace the TV backlight:
- Unscrew the back cover of your TV.
- Disconnect COF cable connections.
- Remove the TV panel.
- Inspect the backlight LED with a multimeter.
- Replace the faulty backlight strip.
- Assemble everything back and turn on the TV.
Note– You should be very careful while dissembling the TV; otherwise, minor negligence will damage your panel, or vertical lines will appear on the TV screen.
5. Motherboard Repair
The black screen problem usually resolves after replacing the TV backlight. If your TV problem is still not fixed, it indicates a major fault on the motherboard or T-con board.
If your motherboard doesn’t supply power to the T-con board, then no TV screen will appear. You need to visit a professional repair technician to get it fixed.
Conclusion
If your TV screen goes black, but there is sound, first contact your brand for a warranty claim. If it’s out of warranty, try the above troubleshooting methods to fix the issue. Usually, this problem resolves after replacing the backlight.
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