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  • We are going to be giving a general overview of LCD TV Repair and take a look at the different

  • components in LCD TVs and what can go wrong with these components and their symptoms and

  • also how to diagnose the problems and hopefully get them fixed.

  • If you are having a problem with your TV be sure to check your model number first. This

  • is what appears in this box over here. Every TV is different, this is a Sony LCD TV but

  • you will see the model number over in a box like this. The model number and serial number

  • are very important as that is what will help you to identify what parts are needed to repair

  • your TV. If you are having a problem with your TV please feel free to comment in the

  • comments section below this video or send us a message on youtube with your TV model

  • number and the problem you are having. This way we will be able to diagnose the problem

  • and suggest a fix. So the first thing you are going to want to

  • do is make sure you have unplugged your TV from any power source and you have grounded

  • yourself properly. Next you will want to take out the screws in the TV that are holding

  • the back cover on. Every back cover of a TV is different but most are held in by screws

  • and can easily be removed. So we have removed all of the screws here on the back of the

  • TV and now we are going to remove this back panel.

  • We will start by just identifying the different parts of the TV and then we will talk about

  • them individually. So first we will look at the power supply which is right here in the

  • middle of this TV. The power supply takes in power and distributes it throughout the

  • TV. The power supply is typically connected to a power cord or an AC adapter. The main

  • board which is over here typically manages all of your inputs and outputs for your video

  • and sound. You will see here on the main board that we have RCA connections, a VGA connection

  • and HDMI connections amongst others. You will 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. Over here we have the backlight inverter this

  • part can often be covered by a metal or plastic cover. You might have to take out some screws

  • to get to this part if you are going to replace it. The backlight inverter is what controls

  • your CCFLs or light source for the TV. The last part we are going to look at is the

  • T-Con board. The t-con board will sometimes be sitting right here on a TV, but for this

  • one it is slipped into this little area right here. The t-con board connects this LVDS cable

  • right here to the main board. This cable is extremely fragile so anytime you are working

  • with it you will want to be very careful. One thing to consider is that not every TV

  • is going to be the exact same. So not every TV will just these four main parts, it may

  • have more and it may have less. Some of the parts might be connected where you will have

  • backlight inverters and power supplys on the same board. There are typically two different

  • levels of repair for TV parts. You can open up your TV find the board number and then

  • look up that board number to find a replacement part or you can take your board and try and

  • repair it at the component level. At the component level you would be testing different components

  • on the board to be sure they work. The first board we are going to look at closer

  • is the power supply. The power supply takes in power and distributes it throughout the

  • TV. Now the first thing that could go wrong here is that the TV set will not turn on.

  • If you are not able to turn on your TV, the first thing to check is that the outlet works.

  • Plug something else into the outlet and be sure it turns on, be sure that the outlet

  • works before you start taking apart your TV. If the outlet works and you are still not

  • getting power to your TV. You will want to take a look at the power supply. Power supplys

  • will have a fuse on them. You can check the fuse to see if it is blown and if it is, you

  • can try replacing that and plug the TV back in. If the TV powers on and the fuse stays

  • good, you should be set to go. If the fuse blows immediately right when you plug the

  • TV back in, then you will have another issue on the board that is causing the fuse to blow.

  • If you are going to check your fuse on the power supply, it can be a little bit more

  • difficult. Some fuses are ceramic and you would need a meter to check that fuse and

  • see if its bad. Some common things to look for on these boards

  • are blown capacitors where you have a capacitor that becomes raised at the top or is leaking

  • fluid. The next board we are going to look at is

  • the main board. The main board controls your video and audio inputs and outputs. The first

  • sign that there could be something wrong with your main board is if your picture on your

  • screen is not appearing. You plug in a blu-ray player to your HDMi connector and it does

  • not work, or you have your cable box connected anywhere to the main board and you are not

  • getting a picture on the screen. If this is the case, I always suggest that you check

  • the source to be sure it works on a different TV.

  • Now it is possible to repair the main board at the component level but it can be very

  • difficult at times. Component level repairs take a lot more knowledge and expertise, board

  • repairs you typically just have to remove the screws and carefully remove these connectors

  • and then you can put a new board right in there, put the screws in and reconnect the

  • connectors and you should be good to go. Typically we recommend that you replace the entire board

  • as that will be easier and faster for your TV Repair. You would want to look up the board

  • number off of the damaged board on our website and find compatible replacement for this board.

  • You can also search your TV model number on our website and that will show you all the

  • compatible parts for that TV model number. Typically with a main board you will see a

  • lot more video issues than you would audio issues. One of the most common issues if having

  • a bad HDMI input. Up here we have the T-con board. The t-con

  • board is what connects your main board to your LCD panel through the LVDS cable. This

  • cable is very fragile so you will want to be very careful if you are disconnecting it

  • at any point. One common symptom of a bad t-con board is

  • if your TV has backlights and sound but there is no picture. So lets say you have your cable

  • box connected to your TV, you turn it on and you are able to hear the show that is playing,

  • but you are not able to see the image that means most likely there will be an issue with

  • your t-con board. Because you are getting the sound from the main board, but you are

  • not getting the image through the t-con. Another common problem with the t-con is that

  • you can get colored vertical lines on your screen or half of the screen is missing the

  • picture. Now, something that is a little bit unique about this TV is that the t-con board

  • is bonded into the panel, so you would not be able to replace this t-con board, but now

  • we are going to take a look at a TV where you would be able to replace the t-con and

  • it is located out here on the panel. You will just have to remove the screws that

  • hold the t-con to the panel and then disconnect the connections very carefully especially

  • the LVDS as it is very fragile. Some t-cons can also have ribbon connectors and you will

  • want to be very careful removing those as well. We will show you a video right now on

  • how to remove the ribbon connectors. Using your finger flip up the tab on the ribbon

  • connector and gently remove the ribbon, please do not use a screwdriver to open ribbon connectors

  • as it can cause damage to the pins. Gently guide the ribbon back into the connector,

  • match the line printed on the ribbon cable with the edge of the connector and close the

  • tab on the top. So, the last board we are going to look at

  • is the backlight inverter. The backlight inverter again, takes the power from the power supply

  • and turns on the lights that supply the light for your TV. The backlight inverter is typically

  • 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 typically most are fragile. Some common problems with the backlight inverter;

  • so if you turn on your TV and you see the image show up on the screen for a second and

  • then the TV goes black it could be your backlight inverter that is causing this problem. So

  • if you have sound but you do not have an image it could be the backlight inverter that is

  • causing this problem. Thank you for watching our LCD video. Just

  • a reminder that if you have any issues with your TV and you can't quite figure out the

  • problem, feel free to comment below this video in the comment section and be sure to include

  • your TV model number, possibly the serial number and any symptoms or problems that your

  • TV is displaying. If you do not want to post a comment below the video, please feel free

  • to send us a YouTube message. The more information that you can provide to us about your TV issue,

  • the faster and more accurate our response can be. Thank you for watching one of our

  • many video tutorials, here at ShopJimmy.com. If you have any further questions about your

  • repair, simply post a question on the comment section below or call our award winning customer

  • service team at the number on your screen. We strive to learn and share new TV repair

  • tips everyday. Subscribe to our youtube channel and grow with us, share our videos with your

  • friends and help us spread the savings and don't forget to hit that like button.

We are going to be giving a general overview of LCD TV Repair and take a look at the different

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液晶電視維修評測及概述-液晶電視維修常見的問題、症狀、解決方法及維修方法。 (LCD TV Repair Review & Overview-Common Problems, Symptoms, Solutions and Repairs for LCD TV Repair)

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    稲葉白兎 發佈於 2021 年 01 月 14 日
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