20 Most Recent Vizio E550i-B2 55" LED TV 1920x1080, 120 Hz, HDTV Questions & Answers

First thing is test power supply voltages as the power board on this model has had some issues. You need to test the 12 Volt supply for correct voltage and ripple as cap failure is somewhat common. Don't worry about the 5 volt supply. If the voltage looks good you have a bad main board and that board will be hard to find and expensive, over $100 in most cases. As strange as it sounds a bad inferred sensor board will also make no sound but I can't say I've head of that issue being intermittent.

you have to hook it up to either a cable or an antenna .DUH

check the sound settings in menu

The sound board could be faulty there could also a a loose ribbon cable problem inside of the TV. If he TV is not been turned on to mute Under the audio or either the audio settings on the TV's screen menu,and the TV's Speakers are turned on . All of the cables that have been physically connected to the TV and the input devices are fully secure. Change it to another input device and verify there is sound is coming from the TV speakers.

You can go to the Vizio site and download their manual and if that doesn't have it! You can look download a service manual from one of those sites on the web that has service manuals and that is what I did. It cost me $12 for the service manual but was helpful, somewhat!

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.

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.

If you can see an image with a flashlight and you can control the tv with the remote then the main board is not the problem. You've replaced the LED driver board, so that leaves the LED strips inside the LCD panel as the likely problem.

Sounds like 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://electro-medical.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

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://electro-medical.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....

What is the part number that you are replacing each time

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://electro-medical.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.

http://www.shopjimmy.com/lg-lc550dug-jfr1-led-strips-12-strips.htm Call these guys. They can assist you. What Vizio is saying is the LED strips are mounted in the LCD panel and cannot be replaced.

What are you doing?

The led is what makes the picture try replacing that it it's the only one you didn't change out

My dear follow the way shown in the pic

One or more of the LED backlight strips behind the LCD have failed. Difficult and sometimes expensive to fix.