Question about Vizio XVT472SV 47 in. HD-Ready LCD TV

1 Answer

Relay clicks when applying power. Yellow light comes on. TV is dead otherwise. Power supply is outputting +5, 12, and 24 volts Mainboard (3647-0282-0150) has +5 and 12 volts always applied. Checked all 8 regulators (3 different types on board) all appear normal. Power on switch has no control; set appears dead! What else on the mainboard might be suspect?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 153 Answers

Amber light on means standby voltage is high. IF amber light does not go white when power button is pushed the its one of two things.
A. No power on command from main board. Usually labeled PS-On. Should go high from 3.3v or maybe 5volts. If not present Main is defective.

B. If the ps-on line is going high then your problem is a defective power supply.

Posted on Oct 15, 2013

  • Steven Kingsley Oct 17, 2013

    I think the solution offered by Mr. Long is correct; i feel comfortable in puttint

  • Steven Kingsley Mar 10, 2014

    I've been fiddling with this VXT472SV fo 3 months - now wanting to pay over $100 to replac3 the mainboard. i discovered a service manual for this (only flowcharts, no schematics) of a similiar model (VL470M) and found out that the sflow steps checked out except last step. This calls for +1.08v reading at pin 7 of U16. U16 is a G5627 PWM buck converter. Whwn I scoped ths pin I found approx. 10 mhz pulse at this output pin. There is a filter network after this pin but shoud I still show roughtly 1.08 volts filtered at this PIN?

×

4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

dharknesst
  • 1 Answer

SOURCE: Vizio VO370M will not power on. Vizio log stays

did you ever finish the repair?

Posted on Dec 07, 2011

freetek
  • 5568 Answers

SOURCE: vizio VA 26 L HDTV10A black screen after on for 3

There remains only the fluorescent back light tube(s) or the inverter that supplies high voltage for it (them). If you had no warning flickering, I would look for the inverter board.

Posted on Dec 01, 2010

SOURCE: Vizio 42 in L42HDTV10A no power no lights no nothing

You can look at the various module failure symptoms and service / replacement options for the L42HDTV10A here:
http://www.coppelltvrepair.com/search?Q=l42hdtv10a&As=false&Pf=&Pt=&Sid=false&btnsearch=Search

Posted on Apr 25, 2013

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Power supply or mainboard?


what is the model # of your TV

Jun 02, 2013 | Televison & Video

1 Answer

UNIT WILL NOT POWER UP / NO FROUNT LIGHT / NO RELAY CLICK / HAVE CHANGED POWER SUPPLY BOARD ALREADY


if you change power supply then make sure it working check for stby 5 volts and check volts on power switch if voltage are there then power supply may be good. try to disconnect connector or sc board and ss boards. both on side of the tv then turn on the tv it will give you click turn on tv you should hear somr sound if not then your main board is defective if tv come on when disconnect the ss or sc boards then one of them boards are defective

Dec 03, 2011 | Panasonic TH-42PD60U Television

2 Answers

Standby light sometimes comes on. When on and control box pressed turns green then switches back to red with clicking noises coming from set. Seems to be going through various sources.


This tv problems u have are only can be causes by only two boards 90% lightly it is the tv power supply board.5% it could be the tv Tuner signal board.5% could be both boards are dead require changes both boards.The tv power supply board it is the board that where the tv power a/c cord plug into it.The tv Tuner signal board it is the board that where the incomming broadcasting signal cable wire plug into it.Tries websites like Shopjimmy.com,Ebay.com to by a whole refurbishes power supply board or tv Tuner signal board or both.

Apr 06, 2011 | Hitachi L32H01 32 in. HD-Ready LCD TV

1 Answer

Power button does nothing, supply shuts off


Hi,

did you try checking the fuse? and the power supply of your TV, If you have a digital / analog tester, You can trace where the power is cut off, if there is
no output on the power supply itself it is possible that the diodes or voltage regulators were opened, but you must have strong background to do this otherwise you need to consult an authorized technician.

Check whether the picture tube is good or not, without schematics, it would be tough to fix..
Check the starter box, transformer etc as well.

Hope that helps

Nov 23, 2009 | Panasonic TH-50PX60U 50 in. Plasma HDTV

1 Answer

SAMSUNG T.V MODEL; CS-29Z40HE This T.V buy on JULY 2007 PROBLEM; No power; total dead; no red led stby; have beep sound...tick...tick...like not enough power when power on (maybe sound come from relay)....


Check the PTC parts,the primary AC power supply board.Disconnect the power supply board,measurement the capacitors and power tranzistors,measurement the output voltage(155V),connect on the output on 60W electric bulb,if it light the power source is ok and the problem in the horizontal driver parts(trafo,power tranzistor...).

Sep 27, 2009 | Samsung Televison & Video

2 Answers

Mainboard P4P8T doesn't boot.


doesn't boot? what you want to do? you want install something, or you want open the computer?

make it clear you problem!

otherwise, if not booting from the cd or dvd, use anothe dvd but check first boot manager from the bios... then if its okay.. use anothe dvd or cd room....

Sep 11, 2009 | ASUS T2 P4P8T WO/CD/MDM FM AGP8X GETH WIFI...

1 Answer

Daewoo TV Dead


STARTING: fuse, swelled capacitors, voltage reading on the output of the power supply board. In that order. BE CAREFUL the power supply board is the one that plugs in the wall and has 120 volts on it. The output should only be 5 and 12 volts etc. If you have nothing there, that's a good thing, the rest of the TV is probably good.

WARNING: This applies only to a modern, flat TV. If it's a older CRT type, they have up to 50,000 volts in them and will KILL YOU.

Aug 24, 2009 | Televison & Video

2 Answers

Tv wont turn on


Ur high voltage is dead,the FBT,the flyback transformer is dead.The big black block of plastic with a red wire with a cap hook to the CRT(tv tube).

Mar 19, 2009 | Sony FD Trinitron WEGA KV-36HS420 36" TV

2 Answers

TV dead, clicking noise coming from back of set


it is probably the relay that is clicking, there is problem maybe in the power supply section or some parts that is defective.

Aug 01, 2008 | Televison & Video

1 Answer

Power supply of tv


if voltage drops means there is a short circuit in your tv. 1 disconnecting 120v line if supply becomes ok then there is short ckt in horz.section &if it does not gives 120 volts then there is problem in power supply. please check as per instruction &let me know. good luck.

Sep 19, 2007 | Proscan PS36500 36" TV

Not finding what you are looking for?

Open Questions:

See all Vizio XVT472SV 47 in. HD-Ready LCD TV Questions

Vizio XVT472SV 47 in. HD-Ready LCD TV Logo

163 people viewed this question

Ask a Question

Usually answered in minutes!

Top Vizio Televison & Video Experts

The Knight
The Knight

Level 3 Expert

73665 Answers

CoppellTVRepair.com

Level 3 Expert

749 Answers

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers

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

Answer questions

Manuals & User Guides

Loading...