Vizio M70-C3 Half picture is bad, main board on its last leg?

[gavric]

Hello, i am working on Vizio M70-C3. It can hardly power on, it takes 15 power button presses or remote. Seems like eeprom problem that I seen before but all reading online says that this tv has power board or main board problem.

When tv powers on vizio V logo shows nice on whole screen. picture 1
When it goes into tv mode it only shows good picture on left side of screen, right is all scrabbled up. pic 2
When i start youtube picture shows on left side fine, right is all scrambled. pic 2
When i click video to start playing picture goes black(like when you change resolution on monitor) and picture only shows on 1/2 of left side. only 1/4 of whole screen is now working. pic 3
After playing like this tv shuts off and again problem to power on.
Did anyone ever figure problem with these except saying GPU or main CPU needs to be reflowed

Its not problem with screen because it shows Vizio V upon power on on whole screen.
Tcon also same - it shows picture fine on boot and shows V on whole screen.

I did not open the tv yet because it seems to me like corrupts firmware or messed up cpu-graphics chip.

Your opinion and help is very appreciated.

[alfatv]

Re: Vizio M70-C3 Half picture is bad, main board on its last leg?

Did anyone ever figure problem with these except saying GPU or main CPU needs to be reflowed

There is no substitute for this.
The best options are reballing or instaling new chips if you can find them.

[frannyjunk]

Re: Vizio M70-C3 Half picture is bad, main board on its last leg?

Hello, i am working on Vizio M70-C3. It can hardly power on, it takes 15 power button presses or remote. Seems like eeprom problem that I seen before but all reading online says that this tv has power board or main board problem.

When tv powers on vizio V logo shows nice on whole screen. picture 1
When it goes into tv mode it only shows good picture on left side of screen, right is all scrabbled up. pic 2
When i start youtube picture shows on left side fine, right is all scrambled. pic 2
When i click video to start playing picture goes black(like when you change resolution on monitor) and picture only shows on 1/2 of left side. only 1/4 of whole screen is now working. pic 3
After playing like this tv shuts off and again problem to power on.
Did anyone ever figure problem with these except saying GPU or main CPU needs to be reflowed

Its not problem with screen because it shows Vizio V upon power on on whole screen.
Tcon also same - it shows picture fine on boot and shows V on whole screen.

I did not open the tv yet because it seems to me like corrupts firmware or messed up cpu-graphics chip.

Your opinion and help is very appreciated.

I had this same exact problem. Turned out to be the chips under the big heatsink on the mainboard. I got lucky with an easy fix. All I did was took heatsink off and put new thermal paste. TV still working after 2 months.