Vizio E601i-A3. I replaced the TCon board. I can see the 'V' when it powers up if I shine a flashlight on the screen. But if ALL Led's go out, wouldn't that be something further up the chain?
Hi Markus Alison, with only one LED that burns, it is enough so that the back lighting does not turn on
To make a correct repair, I advise you to replace all the LED strips, to prevent the failure from repeating in a short time
Hola Markus Alison, con solo un LED que se queme, es suficiente para que la iluminacion trasera no encienda
para hacer una correcta reparacion, te aconsejo reemplazar la totalidad de las tiras de LEDs, para evitar que la falla se repita en poco tiempo
SOURCE: When testin a power supply or led board on tv do i test dc or ac with multimeter?
Your power supply board is working if you get audio and imgaes.
You test AC only the AC side of the transformer before the Rectifier Diodes. Everything after the Diodes will be in DC.
did you get to see any spec of backlight as shown in
LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...
The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
No it means you have no picture, you must do the testing to decide if the PCB is defective or not.
Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
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