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

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • gavric
    Senior Member
    • Jun 2011
    • 65
    #1

    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.
    Attached Files
    Last edited by gavric; 09-02-2021, 08:58 PM.
    Tags: None
    • alfatv
      Badcaps Veteran
      • Sep 2020
      • 353
      • Canada
      #2
      Re: Vizio M70-C3 Half picture is bad, main board on its last leg?

      Originally posted by gavric
      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.

        Comment

        • frannyjunk
          Senior Member
          • Oct 2010
          • 78
          #3
          Re: Vizio M70-C3 Half picture is bad, main board on its last leg?

          Originally posted by 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.
          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.

            Comment

            Previous template Next

            Related Topics

            Collapse
            • Rauni
              Philips 58PUS7805/12 showed no picture; after T-Con replacement, shows halo
              by Rauni
              Hello, this is my first post on this forum, and my first attempted to repair a TV.

              My Philips 58PUS7805/12 stopped working recently. It is not that old, about 5 years. We were on a trip for a few days and when we came back, it had stopped working out of a blue (Perhaps our house was hit by a lightning strike? Don't know.)

              Read from a guide that I should test if the screen shows picture with one of the T-Con cables disconnected. Did that, it showed perfect picture (first on left, later on right side).

              Read also that we should test what happens if we...
              10-01-2023, 12:06 AM
            • csmith
              Vizio D50u-D1 Powers up no picture
              by csmith
              I replaced the backlights all good. Two months later set was dead, had a shorted D9100, replaced all good again.
              Now months later set powers up,backlights light ok,no picture. 12volts missing from fuse on tcon. 12VA on power
              supply is 19 volts. Changed D9100 again, same, 12 volts measures 19. Am I looking at a power supply or mainboard
              issue. Set will power up with remote but not power off....
              07-11-2025, 11:52 AM
            • howardc64
              Vizio M65Q7-H1 Red Vertical Strips fixed by tape blocking LC1 signal to half of the panel
              by howardc64
              Failure Symptom



              No picture, just red vertical stripes. Google search shows quite common problem for these recent Vizio M series although red vertical stripe pattern may differ. Some call it "Netflix" boot screen haha.

              Where is the short?

              Panel has 4x buffer boards. Quickly found the 1/4 panel buffer board with the problem by selectively disconnecting buffer board flex cables.



              Having recently fixed another Vizio with similar symptoms that was a shorted ESD diode array ( link ) Probed the ESD diode array but...
              05-27-2025, 02:56 PM
            • ggil44
              Vizio M65-E0 No Picture, No Sound
              by ggil44
              Hi I inherited a Vizio M65-E0 that isn't working. It must have been dropped on the corner because I found that the infrared circuit had a capacitor with one end broken off of the board and some green corrosion around the plug to the main board. I re-soldered the capacitor and cleaned the corrosion well and tried turning the M65-E0 on and I was successful. My problem is that while the back lights come on and appear to perform local dimming there is no picture or sound. It kind of looks like you are looking at the TV through a very dense fog, where changing the input on the remote will change bright...
              09-03-2024, 08:30 PM
            • grimreaper420
              Samsung Odyssey G9 (c49g95tssr) no picture or backlight. Power LED shows
              by grimreaper420
              hey guys,

              i bought 2 samsung odyssey g9's for a decent price. they both have the exact same fault. when plugged into a power source, the blue led powerlight shows, but when turned on there is no picture, no backlight, no menu, nothing. when plugged into a laptop the laptop recognises the monitor, but keeps disconnecting and reconnecting.

              dont have any schematics or diagrams unfortunately. any ideas?

              thanks
              09-03-2024, 03:47 AM
            • Loading...
            • No more items.
            Working...