Whats wrong with my TV ? I have a vizio 60 inch smart tv. When I turn on the TV the screen is blank. I do have sound and the screen does glow. Something is wrong with the backlight. How do I fix it?

It sounds like you may have a problem with the video signal on your Vizio 55 inch flat screen TV. The fact that the TV turns on and has sound, but no video and vertical lines on the screen, suggests that there may be an issue with the video processing or display.
It could be a problem with the T-CON board, which is responsible for the video signal processing. It could also be a problem with the LCD panel itself.
It's also possible that there's an issue with the cable connecting the T-CON board to the LCD panel, or a problem with the software on the main board.
I recommend consulting the manual of the TV or contacting the manufacturer for further assistance. A professional technician should be able to diagnose and fix the problem.
It's also possible that the issue is with the mainboard or the T-CON board is not compatible with the TV. Thus, it's best to check the compatibility of the parts with the TV before installing it.

Do you know for sure your WiFi is working? If it is, is your TV within range of the signal?

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Sounds like T'Con board fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Circuit diagrams of many popular brand TVs are given.

Open back an replace the video board, or converter board. Get em from Jimmys tv repair.

Good day,
Eh, lines are usually due to the screen being hit and an electrical open appearing in the panel. Sometimes, if the device has been knocked or fallen, the panels connector may have come loose. I would open the TV and look for the video board to see if the connections are still good. Give them a wiggle and see if the line clears.
BE CAREFUL OF HIGH VOLTAGES INSIDE THE BACK !!!


Good luck...

Look on screen keyboard. There are keys to switch from uppercase, lowercase, numbers and special characters.

Sounds like the CPU froze. Unplug set from power completely, then plug back in, should work. If not then the problem will have to be solved by a repair technician.

TF TV 4025 will not turn on. A No Signal sign comes on.

My 37 inch vizio did the same thing. go to your menu screen on the tv and go sound. My tv has an option to turn speakers on/off. Once I turned my speakers off and the back on again everything worked great. hope I helped! if I did please let me know! youtube.com/xniax1