Sony TV that turns on but black screen, what to do?

Sony is one of the largest television manufacturers in the world. Also, Sony TVs are known for their exceptional picture quality. So when you turn on the television and hear sound but nothing is displayed on the screen, it can quickly become very problematic. This problem can have several causes. Discover them in this article, as well as solutions to fix a Sony TV that has sound but no picture.

Sony TV black screen with sound: the causes

Un Sony TV that turns on but the screen remains black can have several causes :

  • backlight failure
  • a faulty T-CON card
  • disconnected or faulty connectors
  • a major software malfunction
  • broken motherboard

If your Sony TV has sound but no picture, the problem may come from backlight, connectors, software or T-CON card.

If the TV has no sound or picture, the problem certainly comes from the motherboard. However, remember to check beforehand that you have set your television to the good video input (HDMI1, AV 2, TV, etc) using the button Input ou Source from the remote, because the problem could be as simple as that.

Read also: TV turning off by itself, what to do?

Sony TV has sound but no picture: the solutions

For solve the image problem on your Sony TV, it exists many solutions which will depend on the origin of the problem. We invite you to follow our guide in order to try to identify the cause and thus repair it with the right tools.

Note: If your TV still has guarantee, do not carry out the disassembly manipulations as this will make you lose your rights. Contact the reseller store now or Sony support.

Power Restart Sony TV

The first step in trying to fix the black screen issue is to perform a power restart. This handling is quick and easy and eliminates potential software problems that may affect the normal operation of the device.

For electrically reset sony tv, simply turn off the TV, unplug it from the electrical outlet for 2 minutes, then plug it back in.

reset Sony TV that turns on but black screen

If this is enough to restore the display of the image, the problem was probably only temporary. If the malfunction returns, then the failure is of hardware origin.

Identifying hardware failure on Sony TV

In the case where your Sony TV has sound but no picture or the image appears for a few seconds then disappears, the problem may come from backlight. In order to check this, a simple trick exists:

  1. Turn on the TV even if the display is not working
  2. Aim a phone flash or other strong light source a few inches from the screen

Case 1 : you see an image, the problem comes from the backlight.
Case 2 : no image appears, the problem comes from the T-CON board or the connectors.

Backlight Check

If you conclude that your Sony TV screen is not displaying an image due to the backlight, two elements that make up the backlight may be responsible: the From or backlight LED strips.

Sony TV backlight problem that has sound but no picture
led bars

Unfortunately, in the case of this breakdown, the repair is complex and expensive. Indeed, it is difficult to find equivalent spare parts. And the older the TV, the more complicated the task. In addition, the repair is very delicate to avoid breaking the screen and the fragile components of the television. It takes time and experience.

If you still want to try repair the fault yourself, We invite you to view video tutorials to help you with the manipulations or to contact online repair assistance services.

If you want have it repaired by a professional, note that repairing the slab can be very expensive. And the bigger the screen, the higher the price. Then contact various repairers near you to obtain quotes that correspond to your television model and thus give you the opportunity to make an informed choice.

Checking the connectors and the T-CON board

When your Sony TV has sound but its screen is completely black even after the light flash test, the problem is most likely a connectors allowing the display of the screen which is defective or of the T-CON card which is out of service.

To check this, you will need to open the back panel of the TV. Before that, remember to cut off the power supply. Once the television is open, discharge the main capacitor present on the power board using an insulated screwdriver.

Then, initially, check that the following connectors are correctly connected :

  • LVDS-cable properly plugged into motherboard and T-CON board
  • tablecloths correctly connected to the T-CON board and the panel
  • connectors properly plugged into the power board and the motherboard

Feel free to unplug them then plug them back in to be sure. Then, if everything seems correct, you can electrically test these different elements to check that their voltage is correct.

If the connections are correct, then your Sony TV turns on but shows a black screen because of the T-CON board. You will therefore need replace it by a similar or compatible card but being careful that it is qualitative. In other words, avoid counterfeits likely to cause many other malfunctions. To help you replace the T-CON board, do not hesitate to watch video tutorials.

Read also: TV that does not turn on and steady light, what to do?

Sony TV Motherboard Check

If your Sony TV turns on but there is no sound or picture, the problem can also come from the motherboard. To check this, you need to test the voltage of its various elementary components, as well as its input and output voltage. If the measurements are not in conformity, it will then have to be replaced by an equivalent and qualitative card.

Once again, to do this, do not hesitate to consult a video tutorial showing you the manipulations. For example, the Spareka video, how to change tv motherboard :

Conclusion

when Sony TV turns on but its screen stays black while you hear sound, there are several issues that could be causing it. Different checks and manipulations can then resolve the fault:

  • an electrical restart
  • a replacement of the LED bars or the slab
  • reconnection of connectors
  • replacement of the T-CON board
  • motherboard replacement

Depending on the origin of the breakdown, the repair will therefore be more or less quick and easy. If in doubt about the origin of the image problem or about the realization of a manipulation, call Sony support or a professional repairer to avoid any risk to you or your device.

Read also: Common TV problems and repair solutions

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