If you’ve been hearing a sound on your TV but can’t see a picture, it’s time to take a look at how to fix this issue. There are a few things to check before you start the process, including the inputs, backlights, and power supply.
Check the input source
If your TV is not showing a picture, there are several things you can check. First, make sure that the input is working. It can be an external source like a DVD player or game console. The remote control should have a button that allows you to change the input.
Second, you should check the cables that connect the input device to your TV. A loose cable can cause problems with audio and video output. Third, you can check to see if your television has a power saving feature. Depending on the model, it might turn off the screen when it is not in use.
Fourth, the television itself might have a problem. In some cases, a defective LED can cause a flatscreen TV to display no picture. This is a common problem. Fortunately, you can check to see if the panel is working by holding the power button for about 40 seconds.
Lastly, you might be able to fix the problem by changing the video output. Check to see if your television has a BLU-RAY input.
Check the power supply
If you have a TV that is having trouble showing a picture, you may need to check the power supply. Some televisions have a power save mode. These will turn off the screen if they aren’t in use. They may also have a sleep timer. However, if you don’t see a picture or hear sound, your problem may be more serious.
Your TV may have more than one power supply board. This means that you should be prepared to take it apart to look at its parts. Make sure that you have a Philips-head screwdriver to do the job properly. You can also consult the manufacturer’s manual for model-specific information.
To check the power supply, you should plug the TV into a working outlet. Once it is plugged in, you should wait about 40 seconds.
After that, you should look at the menus on your TV. If you don’t see anything, you may have a back light, a power inverter, or software that is causing the issue.
Check the backlights
If you have a TV that has no image or sounds, you may need to check the backlights. This is a problem that can occur in a number of different types of TVs. Some of these issues may occur when a TV is turned on, while others are caused by water damage.
To diagnose the problem, you can use a multimeter to determine if the backlights are working properly. You will want to find a part number for your specific model.
After you determine if the TV backlights are working properly, you can perform some tests. First, you will need to disconnect the backlight cable from the TV. Then, you will need to check the voltage on the individual connector pins.
With the multimeter, you can look for a voltage reading of around 100 to 120 volts. A voltage of less than 100 volts is a sign that the board is not supplying power properly.
Another indicator that the LEDs are not working is a flickering screen. Flickering is caused by defective LED bulbs or the backlight strip.
Reset the HDMI inputs
If your TV is not displaying a picture but still has sound, you may need to reset the HDMI inputs. Resetting the HDMI inputs will delete any existing settings on your TV and reset the HDMI cable and input device to factory settings.
First, make sure your HDMI cables aren’t loose. A loose connection will cause an HDMI signal dropout. Also, if your cables aren’t certified, they might not work correctly.
Next, check for a power issue. Sometimes, a power issue can cause the screen to go off. You can turn your TV on and off with the SLEEP TIMER, but you may also need to reset the HDMI inputs.
To reset the HDMI inputs, unplug all your connected devices and disconnect the HDMI cable. Once you have completed this step, re-connect all the devices.
You may need to unplug your TV to do this. There is a button on your remote control that you can use to reset the TV. When you press this button, it will open a SYSTEM STATUS menu.