- #Emerson lf391em4 turns off after logo pop speakers how to#
- #Emerson lf391em4 turns off after logo pop speakers tv#
#Emerson lf391em4 turns off after logo pop speakers tv#
The first thing that could go wrong with the power supply is that the TV will not turn on. There are two different levels of TV repair, component level repair and board replacement repair. T-con board connects the video from the main board to the panel through the LVDS cable. Main board typically manages all inputs and outputs for your video and sound.īacklight Inverter controls your CCFLs and the light source for the TV. Power supply takes in and distributes power throughout the TV. Remove all the screws for the back cover of the TV.
#Emerson lf391em4 turns off after logo pop speakers how to#
We are going to be giving a general overview of LCD TV Repair in this video and we are going to be taking a look at the different components in LCD TVs and what can go wrong with the components and the symptoms they will show and how to diagnose the problems and how to get them fixed.īefore beginning work, be sure you have unplugged the TV from any power source and that you are properly grounded. Please see Product Page on our website for more information!*. While we always strive to provide accurate and detailed information, we can’t guarantee that it will fix your TV’s issues. Please note that other complications may exist that aren’t addressed in this guide. This video is designed to be a guide for testing and troubleshooting your TV repair. Repair review of common LCD TV Problems and Repair. 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. We strive to learn and share new TV repair tips everyday. In some rare cases, if you do have standby, and your TV will not power on, the problem could also be a component on the power supply board, however to start troubleshooting, it is recommended to replace the main board first. This testing is a great place to start for troubleshooting these symptoms. If you check for the 5 volt standby, and you do not receive 5 volts on your meter, then your TV is not receiving power and I recommend replacing the power supply. So, I recommend replacing the main board.
If you check the 5 volt standby on the power supply, and your meter shows 5 volts, then your power supply is working, but the main board is not turning on the TV. Assuming your outlet works, and the TV is plugged in correctly, I recommend replacing the power supply board.Ī quick recap of our first step for troubleshooting the symptom of if your TV will not power on.
If you do not have 5 volt standby, then you are not getting power from the power supply board. After you check the pins, if you do have 5 volt standby, but your TV is not powering on, then I recommend replacing the main board. As you can see, both pins 1 and 2 show our 5 volt standby. If it does not show which one if the 5 volt standby, then you will want to check all of the pins on the cable, one at a time and look for one of them to show as 5 volts. If your board does show what pin has 5 volt standby, then check that pin. Some will have the pin labeled and some won’t. All boards are different, some will have a legend, some will not. You will want to look for the one that shows the 5 volt standby. Then you can look to see if the board has a legend on it, showing which pins show what voltages. Then look for a cable that runs from the power supply to the main board.
I have removed the back cover off of the TV and I will use my meter to check the standby voltage on the power supply.įirst identify the power supply in your TV. If I do see a standby light in the front of the TV, that shows that I do have some power going to the TV, but it will just not turn on. Some TVs have the ability to show a standby light, while others do not. The first thing that I can do is to check and see if there is a standby light in the front of the TV. Here we have an LED TV that will not turn on. Try all repairs and troubleshooting at your own risk. In order to continue troubleshooting, be sure you have the proper training, experience, skills and equipment necessary to use a multimeter to check voltages in a TV. In these troubleshooting steps, we will use a multimeter to check for certain voltages. So if your TV will not turn on, either with the remote or by pushing the power button on it, try these troubleshooting steps. Troubleshooting in this video will apply to a TV that will not power on. In this video we will show troubleshooting steps that will work for a plasma TV, LCD TV & LED TV. How to test for standby voltage to determine if the problem is the power supply or main board.