Question about Vizio SV421XVT 42 in. LCD TV

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Sv421xvt turns on for 10 sec then off - Vizio SV421XVT 42 in. LCD TV

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Most likely a power supply issue. Many of these LCD panels have particular problems. If you search on that make/model you will likely see similar complaints. If you have no way of testing it, you could take a chance on a replacement board - but this will be around $60 to $80, so balance that against the age of the product and the replacement value.

Posted on Apr 03, 2015

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What size screws hold the back cover of a Vizio sv421xvt tv? I am not talking about the screws for the stand.


If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Disassemble & reassemble procedure to many popular brand TVs and other devices are given in detail with illustrations.

Aug 06, 2016 | Vizio SV421XVT 42 in. LCD TV

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Gm cars and trucks with security light on, veihcle will not start,stall after a...


a relearn of the key may help and is done with the ebrake up to keep the day time running lights off . put key in the ignition and turn it to the on position right before crank for 10sec. turn it off for 10 sec. then turn it back on for 10 mins. repeat two more times back off for 10 sec.and then back on for 10 mins. it iscruishle you try to keep with in the times or very close. 10 seconds and 10 minutes three times and that will relearn the key.

this will work for passlock 2 systems and newer.

on Jan 04, 2010 | Chevrolet Corvette Cars & Trucks

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How to preform a key relearn for gm cars and trucks


a relearn of the key is done with the ebrake up to keep the day time running lights off ( not an issue for you) but do it anyway. put key in the ignition and turn it to the on position right before crank for 10 sec. turn it off for 10 sec. then turn it back on for 10 mins. repeat two more times back off for 10 sec.and then back on for 10 mins. it is cruishle you try to keep with in the times or very close. 10 seconds and 10 minutes three times and that will relearn the key.

this will work for passlock 2 systems and newer.

on Jan 04, 2010 | Pontiac Grand Am Cars & Trucks

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

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

1 Answer

Reprogram remote


xl-7 programming instructions first you need to stuff your head up under the dash and locate your module drivers side upper corner under dash does it say programmable transmitter (the first models had no programable modules) if it says that then......
1 confirm all doors are shut and key is out of ignition
2 open drivers door insert key and turn to on within 10 sec
3 turn ignition switch to off in 10 sec
4 push and release drivers door switch 3 times in 20 sec
5 turn ign. switch to on in 10 sec
6 turn ign. switch to off in 10 sec
7 press and hold lock and unlock button on transmitter for 5 sec within 20 sec of step 6 alldoors will lock/unlockto confirm correct process
8 press lock unlock buttons on second remote within 5 sec after step 7 once again all doors will lock/unlock to confirm
9 to add another remote up to a max of four repeat steps 1 through 8 this was taken directly out of an owners manual supplement that comes with a new keyless entry kit (part number for a xl-7 or grand vitara can't remember which one it goes to but it works on either one is 84900-67810) which you would have to purchase if yours is not programable these instructions are the same for vitara, grand vitara, xl-7 and the esteem hope this helps

Jul 05, 2008 | 2002 Suzuki Grand Vitara

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