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Hi.

picked up another TV. This time is a Vizio M65-C1. TV does not turn on. I had repaired another 60 inch vizio , Bad main board.
When power button is pressed, the Power led indicator on the bottom right, turns for a few seconds and then it fades away. No backlight or Vizio logo on screen. Removed back cover and repeated test.
This is the TV This TV is a little different from the Samsung I have worked on. Power supply is on the Left side, Main Bd is on the right side, T-CON , not in the picture is on the bottom. I am assuming that the boards in the middle are the LED...

Generally, not all pads are stuffed with components.

Unfortunately, the section is below bottom heat sink so not many pics show such area

https://www.shopjimmy.com/vizio-756t...masnar-serial/

You can go through posts for searching "M65-C1" on badcaps.

https://www.badcaps.net/search?q=m65...22m65-c1%22%7D

These ~2015 era Vizio main boards with BGA failures all look similar. Here is a video for heat sink removal but probably too low resolution and blurry...

Most common failure is cracked BGA solder balls on the main board BGA chips under the 2 depressed rectangles in the heat sink. Proper BGA removal and reflow is necessary for long term fix (over bake or hot air gun/dryer fix usually don't last long) And need to know enough about heating boards to not do more damage (cold garage floor on bottom and hot air on top will usually warp + crack something)

https://www.youtube.com/watch?v=XjB5vwSqDg0
https://www.google.com/search?q=m65-...3A175255003442...

Hi All,

I am having an issue with my Vizio M65-C1 where it does not turn on. When I plug it in the stand by light on bottom left of screen turns on (white) then fades away. If I press the power button it turn back on and then fades until it is super dim.

When I remove cover, there are no illuminated leds on the main board, I've seen others with a red/blue led that turns on.

I've done some research and what is interesting is my voltages all seem slightly different from other people. For example +5/3.5v is 3.48V when on which is different from others on here....

HI all,
hope someone point to the possible issue before I start buying replacement parts.
Tv starts normal and responds to remote fine, PSU voltages mesured fine 19v was 18.9V under load and 19V with main board disconnected.
Backlight stays on all the time,
Sound works fine.
screen keeps changing form black to full picture in about 1sec intervals.
Picture looks fine with no visible artifacts.
I have disconnected backlights and flashlight test confirmed that picture is still doing the same.


Disconnecting left and right ribbons on...

I have used the search, and am stumped.

My Vizio M65-C1, Vizio logo appears for about 10 seconds then goes off.Power LED blinks 15 times then the TV powers down.

I have read through many threads on the M65-C1 including the following threads. I feel like I must be looking right past the solution to my problem:
https://www.badcaps.net/forum/showthread.php?t=81088
https://www.badcaps.net/forum/showthread.php?t=84241 (not clear on the Eprom actions)


Observations

1) [Interaction] Power turned on via TV button (or remote)...

Re: Vizio M65-C1 | Logo appears for 10 seconds then off



Yes, the internet is full of experts.
There are already proven reflow profiles developed by industry.
https://en.wikipedia.org/wiki/Reflow_soldering
That's reason you need thermometer and the clock is also not hard to find....

Re: Vizio M65-C1 | Logo appears for 10 seconds then off




Fixed. Solution:

1) Protected nearby electronics with aluminum tape (had on hand. Kapton likely better to use).

2) Applied reballing liquid flux around edges of the BGA chip (board has two BGAs, did this process on them seperately)

3) Used 1500 watt heat gun at roughly 6" away. Moved in circular motion.

4) Once I reached a temp of 150*C or 302* F, I slowly moved the heat gun closer and bring the temp to 235* C or 455* F. Advice I found online indicated...

Re: New Members - please post your introductions here

Hello everyone. I found this community by asking OpenAI to how to fix my Vizio M65-C1 TV.

Re: Vizio M65-C1 | Logo appears for 10 seconds then off

Buy yourself a cheap thermometer, a TM-902C off ebay is under $10.
Lead free solder melts at 218C/424F, use flux.

Re: Vizio M65-C1 | Logo appears for 10 seconds then off

Photo attached of entire back to show wiring.

I do have a heat gun, am aware of this technique for reflowing solder for ICs. I am going to give this a try, though want to research the techniques for success a bit. :-)...

Re: Vizio M65-C1 | Logo appears for 10 seconds then off

Most likely BGA chip Do you have a heat gun? If not use hair dryer and heat up large heatsink over each chip for 45 sec to a 1-1/2 min. Real common problem on Vizio “m” series

Re: Vizio M65-C1 | Logo appears for 10 seconds then off

might be a backlight/backlight circuit issue.

Re: Vizio M65-C1 | Logo appears for 10 seconds then off

you don't have the same problem as either of those threads, you don't have any obvious issues with your voltages as they did.

Re: Vizio M65-C1 | Logo appears for 10 seconds then off

those powerboard voltages look good to me, how about a picture of the whole back, as to see how everything is connected.