Vizio VT - Recent Questions, Troubleshooting & Support

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Vizio VT470M no picture, no sound, no backlight. Power supply board looks good all voltages appear correct.

Im having similar problem and with my limited knowledge of lcd tvs and the voltages ALL being good except the pwr on or sw on voltage from the main board to the power supply which tells it to switch everything on Im guessing that something is going wrong on the main board. In the condition where it freezes it (the power on V) which switches everything on i get varied voltages such as 2.5 or 3 or (the normal 5v) and then when nothing powers up (blank screen) i read 0v on pwr on voltage but all my other voltages are corect (24v to inverter, 12 v to main board, 5v, etc.) Im guessing from researching this is that there is in improper voltage somewhere in the main board circuit. I have been unable to find it so i may order another board and post back.
7/11/2019 2:26:08 AM • Vizio VT470M 47... • Answered on Jul 11, 2019
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Vizio VT420 has scrambled display, no stanby lamp or power on lamp, PS 12V meas 11.35 and Tuner works

I'd go with a power board for starters, are the other voltages ok on the power board or are they all low
3/6/2018 9:44:57 PM • Vizio VT420M LCD... • Answered on Mar 06, 2018
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I have a vizio model vt420m. When I turn it on the

Hi, it seems a main board issue but for better assistance you can contact Vizio technical support using the information shown bellow: Email: [email protected] Tel: (877) 698-4946 Fax: (949) 585-9563 Hours of operation: Monday - Friday: 6 am to 9 pm Saturday - Sunday: 8 am to 4 pm Please have your VIZIO model number, serial number, and date of purchase available before you call.
12/25/2017 11:14:18 PM • Vizio VT420M LCD... • Answered on Dec 25, 2017
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No picture or sound.

Hi, it seems you have a faulty mainboard, but the better and more secure option to avoid spending money unnecessary it's to contact directly to Vizio technical support: Email: [email protected] Tel: (877) 698-4946 Fax: (949) 585-9563 Hours of operation: Monday - Friday: 6 am to 9 pm Saturday - Sunday: 8 am to 4 pm Please have your VIZIO model number, serial number, and date of purchase available before you call.
12/25/2017 11:06:07 PM • Vizio VT420M LCD... • Answered on Dec 25, 2017
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I have a Vizio VT420M. When I turn it on by remote, or power button, the Vizio light changes from amber to white, but I get no picture at all OR sound. Do these symptoms sound like a bad power supply,

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
3/25/2017 4:20:19 PM • Vizio VT420M LCD... • Answered on Mar 25, 2017
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None of the control remotes we used work

Check the contacts for channel and volume on the remotes.
11/26/2015 5:29:53 PM • Vizio VT470M 47... • Answered on Nov 26, 2015
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I've owned a Vizio VT420M for just over 13 months.

The flickering is most likely due to a faulty fluorescent backlight. Once the bulb heats up the flickering usually goes away. Some bulbs are easier to replace than others so I would contact your local TV repair shop.
10/28/2015 1:48:30 AM • Vizio VT420M LCD... • Answered on Oct 28, 2015
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Hi I have a vizio vt42om the logo lights up then goes off is that the inverter board or the power supply or just the fuse

Sounds like main board fault. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
12/2/2014 6:45:09 AM • Vizio VT420M LCD... • Answered on Dec 02, 2014
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Sony Vizio Hulu Plus Streaming Issues

where is channel set up
12/28/2013 11:26:13 PM • Vizio VT... • Answered on Dec 28, 2013
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I have a vizio vt-420m 1080p lcd tv that will turn

Sounds like a main board issue. Beware, some Vizio main boards can be hard to find and expensive !!!
10/30/2013 6:58:53 AM • Vizio VT... • Answered on Oct 30, 2013
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The audio and picture on my vizio vt470m are

You could have Bad Capacitors on the Power supply board they will be vented or swollow on Top
1000uf 16v 2200uf 10v 3300uf 10v.
PTS they rebuilt boards 1-800-844-7871
8/21/2013 3:04:39 PM • Vizio VT470M 47... • Answered on Aug 21, 2013
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