Vizio VT - Recent Questions, Troubleshooting & Support


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.

Vizio VT470M 47... | Answered on Jul 11, 2019


I'd go with a power board for starters, are the other voltages ok on the power board or are they all low

Vizio VT420M LCD... | Answered on Mar 06, 2018


Hi, it seems a main board issue but for better assistance you can contact Vizio technical support using the information shown bellow:
Email: techsupport@vizio.com
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.

Vizio VT420M LCD... | Answered on Dec 25, 2017


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: techsupport@vizio.com
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.

Vizio VT420M LCD... | Answered on Dec 25, 2017


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.

Vizio VT420M LCD... | Answered on Mar 25, 2017


Check the contacts for channel and volume on the remotes.

Vizio VT470M 47... | Answered on Nov 26, 2015


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.

Vizio VT420M LCD... | Answered on Oct 28, 2015


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.

Vizio VT420M LCD... | Answered on Dec 02, 2014


where is channel set up

Vizio VT... | Answered on Dec 28, 2013


Sounds like a main board issue. Beware, some Vizio main boards can be hard to find and expensive !!!

Vizio VT... | Answered on Oct 30, 2013


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

Vizio VT470M 47... | Answered on Aug 21, 2013


The main board of this Vizio is known to fail after some use.

Its number is CBPF9D1KZ4 and as you will see it is hard to find, unless you want to pay $250 or so, which doesn't make any sense, at least to me.

Another common failure in those is the T-CON board, but from the sound of it the problem you have is in the main board.

Here's what I'd do if I were you: post a local ad on Craigslist, sell it to the highest bidder and use the money towards puchasing a new TV.

Not sure it's what you want to hear, but it's what I tell some customers and thus losing business that I couldn't have had anyway because it's insanely expensive and prone to more failures anyway.

If it helps you please vote for me - it helps me in turn :-)

www.coppelltvrepair.com

Vizio VT420M LCD... | Answered on May 25, 2013

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