I have a 3 1/2 year old VIZIO SV370XVT and have been having the same problem as the original poster (horizontal lines at top of screen and screen freezes below). The pattern was not exactly the same as the OP's pics but was similar. The problem started when the TV was off for a while and got progressively worse just as the OP described.
In my case the system reset worked (at least so far anyway, crossing fingers).
For whatever it's worth, here is exactly what I did:
1. I have my TV plugged into a power strip, so the first thing I did was to shut off the power with the TV turned on to simulate a power outage.
2. With the power shut off and using the power button on the TV (not the remote button), I held the button in for 30 seconds (or more).
3. Switching the power strip back on, I then pressed and held the power button on the TV for another 30 seconds to turn the TV back on.
Problem seems to be fixed for now.
I will post if the problem comes back.
My unit has two ribbons that come out of the t-con board. One goes to the top right side of the screen and the other goes to the top left side of the screen. If I unplug the ribbon coming out of the t-con board going to the right side, the right half of the screen will go white but the other half still has the horizontal lines and choppy picture. Same thing happens when I remove the left side ribbon coming out of the t-con board.
I did tear it apart enough to fiddle with the tab bonds while it was on and nothing improved the picture.
Of course when I remove the cable going into the t-con board then I am just getting a black screen with no lines.
So my question is has anyone replaced the t-con board as Halkenguard suggested might be the problem?
I have a different model Vizio then is titled in this forum. I have a VO370m but the symptoms were exactly the same. Lines across the screen and freezing(as pictured) depending on the heat and humidity , as well as time idle. The problem got worse with time(years) till Iit would take an average of 3-5 minutes for the TV to render an image, If it ever did, sometimes it would not work for days.
After installing the t-control board, MY TV started right up and immediately rendered an image.I got to seen a boot up screen I forgot even existed. I have not seen one line or had any delay since.
It is possible that the boards just go bad with time. I got a used one just to see if it would work.
I suspected it was the t-conrol board when i first opened it up since it is the gpu for the TV, responsible for rendering the image on the screen. It did not seem likely that it was the power supply since it always turns on reliably. I didn't think it was the motherboard or cpu( the Main Unit as you have called it on this forum) since all of TV functions and ports were working properly. So I was thinking it had to be the screen (not worth replacing $$) or the Graphic Processing Unit (T-control board) which is responsible for rendering the image on the screen.
To be clear this is the first TV i have ever worked on, but i am very familiar with computers and computer repair. What struck me when i first opened my TV was that it was just a very simple flatted out computer that was all screen and very little PC.
Anyway I found this forum and it did help me a lot in that it confirmed my suspicions since you guys had tried basically everything except replacing the T-control with no results. So if you have any questions or need any help installing it i would be glad to help.
This is the card I bought for my VO370m
This is the card you will need for the TV model Titled in this forum Vizio SV370XVT
New or used that's your Choice. I like to have a warranty either way, since we know these boards go bad. The longest i could find was 90 days tho so it might just be better to buy a used one every few years if it does go on you.
Thanks for your help everybody. It feels empowering to fix something new and not take part in our throw away culture!
Now that were heading into the summer again, I'm sure I'll see this problem return with a vengeance once my air conditioner is back in use regularly and the humidity rises again.
If the problem does return, I may try Tedouesz's (thanks for the info) solution. Of course, if I do, I'll post back the results.
Replace the Vizio E601i-A3 LED RUNTK5261TPZC T-Con board
Putting in a new T-Con board was challenging but it solved the problem.
Hope this helps and you have gotten your TV up and running.
You think for the money we spent for these TVs they could give us a product that lasts!
JJ - Montreal
Unfortunately, this is not the problem, as others have claimed. If the T-Con replacement fixed your Vizio, please post if your TV was that same exact model in my original post of this thread, and if you were experiencing the same exact problem.
So, I received my replacement today. Before I installed it, I ensured my TV was off for several hours, and when I turned it on, the lines were all over the place.
If the T-Con board was the problem, after I install the replacement, the lines should be gone, right? Wrong. After I installed the replacement, I turned the TV on, and the lines were all over, just as before.
Now, to check if the replacement was defective, I waited for the lines to go away, which usually happens after about 30 minutes or so. Once the lines were gone, I turned off my TV, and re-installed my original T-Con board. This way, if the lines came back after installing the original, I could verify if it was definitely a T-Con problem. However, after I installed the original back, I immediately turned the TV on, and the lines did not appear. This basically confirms the T-Con board, for my particular model is not the problem.
I did not replace the T-Con cables. So maybe there's a problem with them, but right now its not worth the effort to figure that out.
ALSO, I can confirm this problem is definitely related to humidity or air conditioning. During the past Fall/Winter season, I didn't experience the line problem once, not one single time. Once the hot and humid weather started, and I started using my air conditioner, the problem immediately returned.
WARNING: NEVER BUY VIZIO. NEVER! NEVER! NEVER!
I purchased a used t-con board, replaced my original. Problem still occurred. Then I waited for the lines to stop, and put my original t-con board.
It's been a week, and I haven't experienced any problems with my display. The weather has been hot and humid, air conditioning running, and even after having my TV off for an extended period of time, the problem has yet to re-appear.
Maybe all I needed to do was completely disconnect my t-con board, then reconnect it. I'm clueless as to what resolved the problem, or if this fixed state is simply temporary.
So, my suggestion to those experiencing my same problem, is to completely disconnect their t-con board, then reconnect it.
If or when the problem returns, I'll report back.
UPDATE: Oh well, here we are a day later, and the problem came back. Sheeesh! One week, not one problem. Then a day after I post about it, problem comes back.
Should be here within a week I would imagine and will update again once I get it installed.
Fingers crossed in Oklahoma --- I really like this set and it fits my corner furniture unit perfectly.
Board number was a 1673A2 on the white sticker on the board in the unit, replacement part ordered is a "lg philips 6871l-1673a"
More later in the week.
Just went through the same ordeal. I put an 85Hz signal through it (from computer of course) and everything scrunched up to the top. It did this once and came back (when I had it at 120Hz) but soon did it again. I replaced the power board, the TCon board and the Main board, none of which did any good.
I suspect a bad panel. 150.00 dollars in boards down the drain.
If anyone can confirm panel replacement solves the problem, please advise and thanks.
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