The amber light on the front of my TV is on and I can manually or use the remote to turn the TV on but the only thing that happens is the Vizio light goes from amber to white. No picture,sound or remote control functions and can only turn the power off by unplugging the TV

If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

1. pull battery from remote for 10 seconds. This will force reboot of remote. test, if fail move ahead,



2. do a main reset on Tv,, pull power plug from power source,, wait 10 seconds, reconnect, turn on!, fail continue



3. ? when you turn on TV is the stand by led light amber, when you turn on LED\'s does it start to change color , but standby light is still on? if test positive with findings issue should be your motherboard or even power board but it should be Mo/Bo..

your Main board went bad, common issue with these units. Need to be replaced, in tv land it called main board in computer world mother board. your unit has only two boards power board and that is good cause you get a amber to green to amber led. good luck Vizio field tech

check your inverter board and wires 2 make shure there not arking. then check your six transformers on your inverter with volt meter

You will need to have the set diagnosed as there a number of things could cause this. But I would say you're looking at a power supply or main board problem. It is also possible that your key controller (side buttons) is defective. I take it the TV doesn't turn on with a remote either?

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Do you have back light when turning on the TV? if you do then just replace the main board should resolve the problem. if you do not have back light, you will need to replace the inverter board(s) depending on your model. The inverter board(s) is located on the left side of the TV facing back of TV. you may have two inverter boards depending on your model. the other is located on the right side of the TV. Both mount vertically.

For the 46" TV, it sounds like the main board is bad.

For the 50" Vizio: is the LED light on?

IT SHOULD BE UNDER WARRANTY. TAKE IT TO AN AUTHORIZED VIZIO SERVICER.

Does the remote have one power button for on/off .... or, does it have separate buttons ?