CD TV Repair Tutorial - LCD TV Parts Overview, Common Symptoms & Solutions - How to Fix LCD TVs

    CD TV Repair Tutorial - LCD TV Parts Overview, Common Symptoms & Solutions - How to Fix LCD TVs

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     We're going to give a general overview of LCD TV repair and take a look at different components in LCD TVs and what can go wrong with these components and their symptoms and also how to diagnose problems and hopefully get them fixed. . If you are having problems with your TV be sure to check your model number first. Here's what appears in this box. Every single TV is different, it is Sony LCD TV but you will see the model number in a box like this. Model number and serial number are very important as that will help

    You can check your TV to identify which parts are in need of repair. So the very first thing you will want to do is make sure that you have unplugged your TV from any power source and you have grounded yourself properly. Next you'll want to take out the screws on the TV with the back cover on. Every back cover of a TV is different, but most are held on by screws and can be easily removed. So we've removed all the screws here on the back of the TV and now we're going to remove it back on the panel. We'll start by identifying just the different parts of the TV and then we'll talk about them individually. So the first thing we'll look at is the power supply which is right here in the middle of this TV. The power supply takes power and distributes it across the TV. The power supply is usually connected to the power cord or to the AC adapter. the main board which is here usually manages

    All your inputs and outputs and sound for your videos. You will see here on the main board that we have RCA connections, a VGA connection and an HDMI connection among others. You also see here that we have these wires that run to the speakers for the TV, so again this will control your audio and video inputs and outputs here we have this backlight inverter The part is often covered by metal or plastic Can be covered. You may have to remove some screws to get to this part if you are going to replace it. The backlight inverter is what controls the light source for your CCFL or TV. The last part we're going to look at is the T-Con board. T-Con boards sometimes just sit right here on the TV, but for the sake of it it's slipped into this little area here. The T-con board connects this LVDS cable right here to the main board. This cable is extremely delicate so whenever you are working

    You'll want to be very careful with this. One thing to consider is that not every TV is going to be exactly the same. So not every TV would just be these four main parts, it could be more, it could be less. Some parts can be combined where you will have backlight inverter and power supply on the same board. There are generally two different levels of repair for TV parts. You can open find the board number on your TV and then look up that board number to find a replacement part or you can take your board and try to repair it at component level. Component Level You will test different components on the board to make sure they work. The first board we are going to take a closer look at is the power supply. The power supply takes power and distributes it across the TV. Now the first thing that can go wrong here is that the TV set will not turn on. If you can't turn on your TV, the first thing to check is that the outlet works. Plug something else into the outlet and be sure it's on, make sure the outlet is there before you start taking your TV apart.

    If the outlet works and you are still not getting power to your TV. You'll want to take a look at the power supply. Power supplies will have a fuse on them. You can check the fuse to see if it is blown and if it is, you can try to replace it and plug the TV back in. If the TV is on and the fuse stays good, you should be ready to go. If the fuse blows immediately when you plug it back into the TV, then you will have another issue on the board that is blowing the fuse. If you are going to check the fuse on your power supply, it may be a little more difficult. Some fuses are ceramic and you will need a meter to check that fuse and see if it is bad. Some common things to look for on these boards are blown capacitors where you have a capacitor that gets clogged up or is leaking fluid. The next board we are going to look at is the main board. your main board. controls

    Video and audio input and output. The very first indication that something may be wrong with your main board is if your picture is not showing on your screen. You plug in the Blu-ray player to your HDMI connector and it doesn't work, or your cable box is connected anywhere in the main board and you're not getting a picture on the screen. If this is the case, I always suggest that you check source to make sure it works on a different TV. Now repairing the main board is possible at the component level but it can be very difficult at times. Component level repair Take a lot of knowledge and expertise, board repair you usually only have to remove the screws and carefully remove these connectors and then you can put a new board right in there, insert the screws and reconnect Do the connectors and you should be good to go. Generally we recommend that you replace the entire board as it will be easier and faster for your TV repair. You will want to look at the board number off of the damaged board on our website and find a compatible replacement for this board. You can also find your TV model number on our website and it will show you all the parts compatible for that TV model number. Typically with a main board you'll see a lot more video issues than audio issues. One of the most common issues if happening is a bad HDMI input. Up here we have the T-Con board. The T-con board is the one that connects to the main board of your LCD panel via the LVDS cable. This

        The cable is very delicate so you will want to be very careful if you are disconnecting it at any point. A common symptom of a bad T-Con board is if your TV has a backlight and sound but no picture. So let's say you have your cable box connected to your TV, you turn it on and you're able to listen to the show that's playing, but you can't see the image that means most More likely there will be a problem with your T-Con board. Because you are getting sound from main board, but you are not getting image through T-con. Another common problem with the T-Con is that you can get colored vertical lines on your screen or half the screen is missing from the picture. Now, something that's a little bit special about this TV is that the T-Con board is bonded to the panel, so you won't be able to replace this T-Con board, but now we're going to see a TV where You will be able to replace the T-Con and it is located here on the panel. You just have to unscrew the screws that hold the T-con to the panel and then disconnect the connection very carefully especially the LVDS as it is very fragile. There may also be some T-cons ribbon connectors and you will want to be very careful removing them as well. We'll show you a video right now

     How to remove ribbon connectors. Using your finger, invert the tab on the ribbon connector and remove the ribbon gently, please do not use a screwdriver to open the ribbon connector as it may damage the pins. Gently guide the ribbon back into the connector, matching the printed line on the ribbon cable with the edge of the connector and closing the tab at the top. So, the last board we are going to look at is the backlight inverter. The backlight inverter, again, takes power from the power supply and turns on the lights that supply the lights for your TV. The backlight inverter is usually connected to the panel and you will want to be very careful when you are removing any of these connections. There are different types of connections from the backlight inverter to the panel and most are usually fragile. Some common problems with backlight inverter; So if you turn on your TV and you see the image appears on the screen for a second and then the TV turns black it could be your backlight that the inverter is causing this problem. So if you have sound but you don't have an image it could be the backlight inverter that is causing this problem.

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