Vizio M50-C1 television goes to blank screen after displaying the Vizio logo for 5 seconds.

If you did the scotch tape trick and it worked for awhile chances are you have more shorted diodes in the panel, it's time for a new TV.

A Vizio TV will flicker if there is a broken backlight, loose or faulty video cable or port, poor signal strength or incompatible display settings. Reseat all cable and connections to the television from your devices. Physically remove the cables from both the television and the device and reconnect them. If you have any of these options available please turn all of them off to see if this resolves the display flickering. lickering and shorted leds causing dark spots are both symptoms of bad leds. You can try turning down the backlight level and see if the flickering stops. The ultimate solution may be to replace the LED strips.

backlight problem

this is not vizio tech support try a local repair shop

The replacement power supply board may have failed.

Are you saying that the same picture is split into two, or that there are 2 images split on the screen? Might be the PIP board or setting on the remote that is bad.

This is a backlight issue, it is either the led backlights or the T-con board, further testing with a circuit tester is required to determine which.

Hello Jerry, for what you mention, the problem on your TV Vizio M43-C1, is in the backlighting, some of the LEDs that illuminate the LCD Panel are wrong and that is why you can not see the image
You have to change all the LEDs to do a correct job
I suggest you look for a specialized technical service
I hope you can solve the problem
Greetings Franco Dosil

Hola Jerry, por lo que comentas, el problema en tu TV Vizio M43-C1, esta en la retroiluminacion, alguno de los LED, que iluminan el Panel LCD est?n mal y por eso no se ve la imagen
Hay que cambiar todos los LED para hacer un trabajo correcto
Te sugiero busques un servicio tecnico especializado
Espero puedas solucionar el problema
Saludos Franco Dosil
http://cdn.vizio.com/manuals/kb/m43c1manual.pdf

That isn't a timing control board issue, see if you have PSON voltage for starters, if you do then test the various power supply voltages, it could be either the main or power board giving issues, but I would bet on the power supply is bad since the logo comes stays on

The main board is faulty