hello guy having issues with one of My LCD TV's ....newbie with the LCD tv repair ...where do I start with this i wonder if it is the controller card or main board issue? having red moving pixelation...=(
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Re: Vizio VS420LF1A
It would help to have clear focused pictures of the insides of your tv. Please post an overall picture of the boards and then a picture of each board. Use manage attachments like you did in post #1.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
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Re: Vizio VS420LF1A
For your sake, I hope it's the video processing board and not the panel itself. Your power supply should be fine.
The first thing I'd do is find out if this occurs on all video inputs. This doesnt prove or disprove one board or the other however if one imput works better than the other, you might want to live with using the working input.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio VS420LF1A
It happens on both HDMI ports as well as the component port I tested with both my Uverse Box and Bluray.Comment
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Re: Vizio VS420LF1A
Are you using different names? Hmm....
OK... as before mentioned in post number 2, post clear pictures of the set opened up, then the boards in this set. Post the numbers that are marked on these boards.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio VS420LF1A
I will take pictures Saturday when I will have the day off of the insides. My friend/rep that sold me the TV made the intial post on my behalf while I was signing up for the forum. I am new to repairing TVs and he introduced me to this forum that he said was extremely helpful when he was repairing several. Sorry for the confusion.Comment
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Re: Vizio VS420LF1A
Attached are pictures of the boards.Attached FilesComment
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Re: Vizio VS420LF1A
I am suspecting the board in the very last picture. I believe it's the t-conn board. I cannot tell you for sure but if you can post the numbers on this board, it can be looked into further.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio VS420LF1A
The red pixelation is intermittant.
LG Philips LCD Co. Ltd.
Desc LG420WVN-SAA1 Control PCB 2L
P/N 6870C-4200C
Designed: 2007.08.22
JA018V
4201B1
tpts0S-2S
94V-0
E88441
0841-2Attached FilesComment
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Re: Vizio VS420LF1A
With this current problem, I suggest swapping this board. I can't promise you that doing so will fix the problem however there is no way that I know of to test this board.
If you search in ebay for "6870C-4200C" you will find a lot of these boards for sale varying in prices. The cheapest one I seen was $20 with cheap shipping. ShopJimmy has them for about $40. There are no guarantees with ebay so be carefull.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio VS420LF1A
I am extremely new to this an just wanted to know what the T-Conn board does on a LCD TV? I know dumb question, but got to start learning somewhere.Comment
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Re: Vizio VS420LF1A
This falls into the category of 'the only dumb questions are those that you don't ask'. T-con (or tcon) stand for 'timing and control'. It controls the individual pixels on the LCD panel so the information from the LVDS cable is accurately displayed.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
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vizio e650i-a2 (LWJAOZBP Serial) led backlight flashes then turns off, has video (via flashlight) and audio.
panel: au optronics T650HVN05.4
72 led total on 12 strips, 6 led per strip wired in three groups of 24 (led driver board has three anode and three cathode pins)
link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1
Vizio 56.04219.641G (liteon PA-3231-01WN-LF) Power Supply Unit
https://www.shopjimmy.com/vizio-56-0...-power-supply/
Vizio 55.75J01.001G (91.75J10.004G) Main Board... -
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... -
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... -
Bug looks like hardware so thought I posted it here. Exact same behavior on 2 different model 4K Vizio TVs running their SmartCast smarttv software. After launching youtube app, press vizio button on remote to return to the smarttv menu, once in awhile, a column of bad pixels will show for few seconds on the left hand side.
It seems the vizio software is reinitializing hardware when returning to the smarttv menu. In general, SmartCast software isn't very good. Also will randomly (relatively infrequent) get no network connection when on wifi and require reboot....
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