There are several possible causes of your television showing a blank screen. These include a broken cable, power supply, back-light, or remote. Fortunately, there are a few easy steps you can take to fix your problem.
Replace the power supply board
Power supply board failure is one of the most common picture problems on Smart TVs. It can affect the picture quality on your TV and prevent you from viewing images. If this happens to you, you might want to try fixing it.
If you are interested in repairing a TV on your own, you should first understand what power supply boards are. They are an important component of your TV that helps you view images. A bad power supply can make your TV display flicker, turn black, or not turn on at all.
Depending on the model of your TV, you may be able to fix a bad power supply by simply plugging in a new power source. But if your TV does not work with your new power source, you will have to replace the power supply board.
Fortunately, this is a simple fix. To begin, you will need a screwdriver. The power supply board is located inside the back panel of your TV.
You will also need a few tools. First, you will need to unplug your TV. Make sure to unplug the cable box as well. This will help ensure the connection is secure.
Next, you will need a flashlight. When the TV is on, look at the back lights. If you see lines, this means that you have a defective panel.
The best thing to do is to have a professional inspect the hardware components on your TV. There is a wide variety of parts on a TV and you need to make sure you have the right ones.
In addition, you should check your power cables. Broken HDMI cables can appear bent in strange angles and may be visibly worn.
Finally, you should check your fuses. A blown fuse is another common sign of a bad power supply.
Although it is possible to fix a power supply board on your own, you should have the proper tools on hand. For instance, you can use a voltage tester to determine the problem. However, tracing the problem is not as easy as it sounds.
Check the HDMI/ DVI cable
If you are using HDMI and your TV shows no picture, you may have a problem with your HDMI cable or port. There are a few things you can do to get your TV working again.
The most obvious solution is to unplug the HDMI cable. You can also try moving the cable to a different input. This is usually a temporary fix.
If you still have no signal, you will need to reset the HDMI connection. You can do this by resetting the INPUT button on the TV remote control. It’s easy to do, and will help you to find out what the problem is.
If you’re not sure what to do, you can check the display menu for your HDMI device. Some HDMI devices have a settings menu where you can change the HDMI signal format. In general, you want to use a resolution of 1920 x 1080. This gives you the best picture quality.
Similarly, you can check the HDMI signal distance by moving your HDMI cable away from your TV. However, there are several factors that affect this. Environmental and technical factors can also play a role.
Lastly, you can also test the HDMI cable for damage. HDMI cables can be damaged by heavy equipment. Also, they can slip out if they are not seated correctly.
For most HDMI issues, the answer is fairly simple. Generally, there are only four potential fixes.
First, check for an HDMI cable with an HDMI logo. Secondly, you should look for a cable that has speeds of at least 18.2 Gbps. Finally, you should try a different connector.
HDMI cables have other features like High-bandwidth Digital Content Protection (HDCP). HDCP performs a key exchange between the source device and the display. Usually, the HDMI ‘no signal’ problem is caused by a bad handshake. When this occurs, the signal will not be able to be routed to other HDMI devices.
Finally, you can check if you need a newer TV or if your video output device is compatible with HDR. Ensure that all of your HDMI connected devices are capable of HDR.
Check the back-light
If you have a TV that has a black screen, you may have a faulty back-light. You can check this by running a flashlight near the screen and observing the images. Having a faulty back-light can be frustrating for you, especially if you use the TV for work.
A faulty back-light can be caused by a number of different issues. Water damage, drop damage, and defective components can all cause a back-light to fail. It can also be caused by a faulty power supply.
First, you should turn the TV off and unplug it. You can then connect a multimeter to the positive and negative connection points and test the voltage. This will show you if the board is supplying power properly.
You should see voltage readings higher than 100 to 120 volts, which indicates that the board is supplying power. If it is below this, the board is not supplying power and will likely need to be replaced.
Next, remove the back-light cable and examine the wires. Each backlight wire has two pairs, one pair going to the ground and the other to the metal chassis. Make sure that there is no loose connection or short circuits.
Once you have removed the wires, you can replace them. If you have a LED TV, you will probably have to buy a new backlight strip. The new strips come with double-sided tape at the bottom. Using a scraper, you can remove the old card from the strip.
In most cases, a defective backlight or power supply will not allow the filtered light to reach the screen. Some TVs have a separate led driver board. These boards can be difficult to replace on your own.
When you do have to replace your backlight or power supply, you will need to know your TV model’s part number. Getting replacement parts can be expensive. Alternatively, you can get a professional to replace the backlight or power supply.
Before you begin, you will want to make sure that you can find the right parts. If your TV doesn’t have an inverter board, you may have to purchase one before you can change the backlight.
Check the remote
A no picture on TV problem can be a frustrating one. It can be caused by a number of issues, such as a loose HDMI connection or a faulty surge protector. However, there are some easy fixes that can help you resolve this problem.
First, check the connections. The cables should be properly plugged in and should not feel loose. If there is a loose connection, reconnect them and try again. Also, ensure that the cable is connected to the proper input on the TV.
If the connection is not a problem, then you might need to check the remote. Check the batteries in your remote and if the top does not flash, you might need to get new ones. You can also test the battery power by turning on the TV.
The power button in the remote might be stuck. You may have to unplug the power cord for a few seconds before retrying. Alternatively, you can try to restart the TV box.
Another option is to check the HDMI cable. Make sure that the cable has an HDMI logo on it. This will let you know that the cable is compatible. If it does not have the logo, it will not be able to display a picture.
You should also check if the cable or antenna is plugged in. The cable and antenna should be positioned properly to avoid the picture from being blurred. Additionally, you should check the backlight on your television.
If you have multiple TVs in the house, you might be using a different remote for each one. If this is the case, you should reprogram each of the remotes for the current TV.
Sometimes, the issue can be fixed by restarting the TV. You can do this by pressing the HOME button on the remote. Other times, you may have to cycle through the inputs on the TV.
Check your TV for any hardware or software problems. If the hardware is fine, but the software is not, you should try to update it. You can check the manual of your TV for specific settings.