LG LED TV No Backlights – 32LN5300 32LN5310 32LN5700 – Voltage Test Troubleshoot LEDs & Power Supply

in this video we will show how to troubleshoot if you have the symptoms of no image or a blank screen but you can see an image on the screen with a flashlight and you do have audio this video applies to the following power supply / LED board part

number E why six to eight one zero three zero one four LG TV model three to Ln five three zero zero – UB for LG TV models three to Ln five three zero zero u b3 – Ln five three one zero – you b3 – Ln five seven

zero zero – you H + panel number LC 3 – 0d u e – s fr1 LED LEDs are panel specific so you must match the panel sticker number to be sure you have the correct replacement LEDs in this video the test that we are showing is checking

the voltages testing the voltages will help to determine if the backlighting problem is being caused by the power supply / LED board or the actual LEDs themselves if you have not run the flashlight / backlight test please click the link in the video – the flashlight test if

there is not a link to click please go to our Channel and find the flashlight test video after running the flashlight test if you determine that you do have an image on the screen while using a flashlight and you have audio but no back lights continue this troubleshooting

video in order to continue troubleshooting you will need to have the skills experience and tools necessary to check voltages on the power supply / LED board it is necessary that you take the proper precautions to protect yourself as checking voltages can be dangerous on a TV that is

powered on I've begun by removing the screws and the back cover off my TV we will be running the test on the power supply / LED board here on the panel we have highlighted this board in the video as we take a closer look at the power supply

/ LED board here is the cable connection that runs from the power supply to the LEDs I will be checking the voltages at this connection since this is a smaller TV we will only have one test point at the connection which is labeled LED plus before I begin

testing the points I will plug in my TV and hit the power button on the side to turn it on I will measure the voltage at the test point and it shows 84 volts which is good before I begin testing the points I will plug in my TV

and hit the power button on the side to turn it on if the voltages were at zero or lower than our normal numbers that would show that there could be a problem with the power supply board I would want to first unplug the TV and then disconnect the

LED cable and then retest the point so unplug the TV disconnect the LED cable plug the TV back in and turn it on and then retest the point we get a reading higher than normal which shows that the power supply is working and there's a problem with the

LEDs if we were getting a lower than normal reading or zeroes then the problem would be the power supply before I begin testing the points I will plug in my TV and hit the power button on the side to turn it on if the voltages show is much

higher than our normal numbers then you most likely have a problem with the LED strips before replacing the LED strips you will want to disconnect the LED cable and retest once again be sure to unplug the TV then disconnect the LED cable plug the TV back in power

it on and then retest the point we get a reading higher than normal which shows that the power supply is working and there is a problem with the LEDs if we were getting a lower than normal reading or zeros then the problem would be the power supply if

you decide to replace the LEDs in your TV here are a few recommendations it is recommended that the replacement be done by a trained professional as during the replacement process there is a chance you could damage the TV panel if you damage your TV panel it is not

fixable and your TV will no longer operate as normal always replace all of the LED strips in your TV at the same time if one of them has shorted out there is a high likelihood of another having the same problem when searching for replacement LED strips be sure

to find the panel information for your TV in search using that information panel info can be located on a sticker on the panel or sometimes on a buffer board in the TV LED strips our panel specific and not model specific if you do need to replace the power

supply board be sure to find a replacement that matches your original part number on the board be sure to unplug your TV you will need to start by removing all of the cables connected to the power supply then remove all of the screws holding the board to the

TV panel after removing the screws you should be able to lift the board from the TV panel then put your replacement board on the panel and secure it using the screws and then reconnect all of the cables if you have any further questions regarding your repair simply post

a question in the comment section below 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 to help us spread the savings and don't forget to hit that like button

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