It sounds like you may be experiencing an issue with the color processing board in your TV. This is the circuit board that is responsible for receiving the video signal and generating the colors that are displayed on the screen. If you are experiencing issues with the color on your TV, it is possible that this board is not functioning correctly. If you would like to try replacing the board yourself, you will need to locate the correct board for your TV model. You can usually find this information in the service manual for your TV or by contacting the manufacturer.
It sounds like your Vizio TV may have a backlight issue, which can be caused by a problem with the LED strips or the backlight driver board.
To determine the cause of the problem, you will need to perform some troubleshooting. Here are a few steps you can try:
Make sure that all of the connections between the TV and the wall outlet are secure.
Check the TV's backlight setting and make sure it is set to the optimal level for your viewing environment.
If the TV has a local dimming feature, try turning it off to see if it makes a difference.
Check the TV's picture settings and make sure they are optimized for your viewing environment.
If these steps don't fix the problem, you may need to replace either the LED strips or the backlight driver board. To determine which component is faulty, you will need to perform some further troubleshooting or seek the assistance of a professional.
It is possible that the issue you are experiencing with your Vizio M55Q6M TV could be caused by a problem with the backlight. The backlight is responsible for illuminating the display on the TV, so if it is not functioning properly it can cause uneven lighting or areas of the screen to appear darker than others.
Other potential causes of the issue you are describing could include a problem with the display panel itself, or an issue with the TV's software or firmware.
Hi Jeannette, it would be VERY rare for a power cord to cause a set not to work. Is the set totally dead or do you get the standby lamp when you plug the set in?
The cables could either be loose or need to be replaced for your TV or the connection ports are broken. The LED lights or the T conn board could be causing the TV screen to flicker.
The T-con board sounds like the most likely issue on your Vizio. Typically if the video signal is being sent to the T-con, then the t-con resolves it into the format required by the LCD screen. In this case since part of the video is fine and the part is snow/static, I would suspect the T-con. Is it perfectly half the screen? Typically there are two connectors out of the t-con to the LCD, so one if one of those is loose or going bad, then that may be the issue as well.
Try a forced reboot...disconnect the power cord either from the back of the TV or its outlet, at your convenience. Then, press and hold the power button on the TV for 3-5 seconds. Finally, plug the cord back in and turn on the TV.
Best to you.
With the TV turned on, press the menu button and shine a bright flashlight on the screen at a shallow angle (about 20° from parallel to the screen). Move it around - if you can see the menu or other material where the flashlight is pointing, you have a backlight failure. This may be either in the power supply, or the backlight itself (sadly, with LED backlights, it's usually a blown LED).
This is a common problem with Vizio TVs. The problem is usually caused by the tv's firmware. You can try updating the firmware, but if that doesn't work, you'll need to contact Vizio customer support.
It's actually the panel that's bad, not the board, one of your clock lines are shorted but it can be fixed with a piece of scotch tape by masking off the correct clock line, there should be 8 of them and it will give a decent picture just using 7, there are some youtube vids that describe how to find the pin to block if you want to dig into it.
Have you tested power supply voltages, that would be a great place to start, should have been done before throwing boards at it verses just guess what's wrong. Look at the legend on the power supply, start by testing the 5 volt supply, if that's missing the set will be totally dead