Question about Vizio SV421XVT 42 in. LCD TV

1 Answer

Screen freezes, and buttons don't work!

I have a VIZIO SV421XVT Tv. 6 months ago or so I had an issue when I try to turn on the TV it would fail to turn on the screen properly. I could hear the audio but no picture until I turned it off and tried it again. Once I got it on it would work perfectly fine. Now I am having a problem when I am watching cable tv hook directly through the COAX jack the TV every once in a while will completely freeze. The screen will either freeze on the picture or go to a black screen and none of the buttons or remote buttons will work. I have to unplug the tv to reset it. I haven't had this problem yet when playing xbox hooked in through the HDMI slot since I have hooked cable directly into the COAX jack. I'm trying to figure out if it is an issue with the cable or an issue with the Power supply board maybe having bad capacitors. Any insight on this would be amazing! Thanks!

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Vizio Master
  • 76,204 Answers

It sounds that the main digital board to your TV has the fault. To check and locate the fault to this board is a very skilled work. Contact any service technician.

Posted on May 28, 2013

  • Vince Schlosser May 28, 2013

    Is there anyway I can find this out for sure? I have the capabilities of fixing it myself if possible. Thanks for your input!

×

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Dewayne Turner

  • 87 Answers

SOURCE: Vizio GV42L LCD TV screen black when turn TV on first time

If you are using a set top box this might be caused by turnig the box on at the same tie as you turn the tv on or slightly after you turn the tv on.  If you are using compnent or HDMI inputs the set needs to see the signal as it is turned on to know what formt the signal is in. 

I’m happy to help further over the phone at https://www.6ya.com/expert/dewayne_4a10eab6caecdb92

Posted on Oct 23, 2007

rylee_smith

Rylee Smith

  • 8619 Answers

SOURCE: vizio 42 hdtv mo picture,no sound

Hi

Thanks for using FixYa. Please check the following—

1. Is Power board output +5V?
2. Is J1 (#19 in the right diagram)connector good?
3. Is DC-DC OK, check the voltage at J1 using a multimeter.
4. Is U4 (3.3V) working ok, U4 is an IC, you’ll need an IC tester or an oscilloscope to check this IC.

After checking this if it still doesn’t work then check P3 D-sub Input (on the D-board). See this schematic for details--




35b7251.jpg




Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks

Rylee

Posted on Oct 17, 2009

Anonymous

  • 13 Answers

SOURCE: VIZIO TV Black screen. Cannot turn off TV without unplugging.

I had a similar problem after having a Vizio for 2 and a half years. I left the room for a minute, i came back and the screen went black. I didnt hear an arcing sound though. There was still power to the unit and you could see that the back light was working, just no picture, no sound, and you couldn't use any of the buttons. The only way to turn it off was to unplug it. It would then start up, with the Vizio logo going from orange to white, and then do the same thing all over, no pic or sound. I would check the ceramic fuse first on the board that gets power from the plug.

HOW I FIXED MINE: I ordered a new "main PCB" from tigerdirectparts.com (you can also use searspartsdirect.com). This is the circuit board with all of the inputs on it (hdmi, cable, etc.) I opened it up, disconnected the old one, put in a new one and now it works fine.I used both serial numbers on the board to search for it online. It cost me $144 to do it, but that's better than $450 for a new TV. My tv is the vx32l hdtv10a. I hope that helps.

Posted on Jan 22, 2010

solver gariz

  • 88 Answers

SOURCE: tv screen went blank

sound like the inverter circuit board problem. check & replace back same part# inverter circuit board. hopefully could help!!

Posted on May 17, 2010

Chi Chu

  • 8457 Answers

SOURCE: My Vizio 42" LCD SV421XVT

U getting a non respones from ur remote or the manual side panel tv controls buttons wright.U already tries resetting it back to factory setting.But the problems still the same.Yes,the tv Tuner signal board is the causes and the problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.

Posted on Dec 11, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Two vizio TV's with issues


Take them to a TV repair centre as they are complex to repair. You may find that your homeowner insurance will pay for the repairs if you can demonstrate that it was a power surge that damage them.

Feb 29, 2016 | Vizio SV421XVT 42 in. LCD TV

1 Answer

42" Vizio 240Hz SV421XVT no hdmi video or audio


Possible bad source, bad cable or connection was made with units powered up which HDMI does not like.

First thing to try in this case is to remove power from set and whatever unit is connected via HDMI and disconnect the cable itself.

Wait for several minutes, connect HDMI again and THEN return power to the units that were removed from power, this cannot hurt and may help or correct this issue.

Failing this try if possible to connect using component connections.

Dec 10, 2012 | Vizio SV421XVT 42 in. LCD TV

1 Answer

Vizio sv421xvt issues


It sounds like a main board issue but could be a power supply issue. I will tell you from my experience with Vizio TV's, main boards are more likely to fail than power supplies. But to be sure, you will want to either get a diagnoses or if you're handy do a little troubleshooting. The power supply and the main board are not cheap so you will certainly want to be sure before spending any money.

Nov 24, 2012 | Vizio SV421XVT 42 Class LCD HDTV - 1080p,...

1 Answer

Problem with Vizio SV421XVT


I am also having the same symptoms for my SV421XVT. TV works great except all HDMI ports are not receiving signal. Devices work through the AV Ports, and TV reception is fine. New Roku box is also not working through HDMI but works with AV. Wish I had a solution to this.


On a another forum for another TV it was suggested that boards need to be replaced. I hope I can get these boards for a reasonable cost.

Aug 16, 2012 | Vizio SV421XVT 42 in. LCD TV

1 Answer

Looking for a jumbo remote that will operate a new 26 inch Vizio Montior. The old one don't work. Is there a new version?


A remote is not designed to control and Moitor. They only run by the video/sound output from the pc. So I am taking it for granted that you meant TV instead of Monitor.

A. Before buying a new remote try replacing the batteries first.

B. I found the Innovage Jumbo Remote Control manual and it has no code for the Vizio TV, you will need to utilize the remote's "Code Search" option.

C. Instructions

1. Turn on the Vizio TV.
2. Aim the Jumbo Universal Remote at the Vizio TV and hold down the "Code Search" button on the remove for roughly 3 to 5 seconds. The LED lights on the Jumbo Universal Remote will come on.
3. Press the "TV" button at the top of the Jumbo Universal Remote.
4. Start pressing the "ON/OFF" button repeatedly until the Vizio TV turns off. This will likely take several minutes due to the amount of available codes.
5. Press "Enter" on the remote immediately after the Vizio TV turns off to save the code.
6. Test the Jumbo Universal Remote by trying to control the Vizio TV with the remote. If the control doesn't work with the remote, repeat the entire process.

Good luck.

Jun 03, 2011 | Innovage Jumbo Remote Control

1 Answer

My Vizio 42" LCD SV421XVT


U getting a non respones from ur remote or the manual side panel tv controls buttons wright.U already tries resetting it back to factory setting.But the problems still the same.Yes,the tv Tuner signal board is the causes and the problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.

Dec 11, 2010 | Vizio 42 in. LCD TV

Not finding what you are looking for?
Vizio SV421XVT 42 in. LCD TV Logo

291 people viewed this question

Ask a Question

Usually answered in minutes!

Top Vizio Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76204 Answers

Tony Nguyen
Tony Nguyen

Level 2 Expert

96 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1691 Answers

Are you a Vizio Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...