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My Vizio M470sv tv will power on the power right back off after a few seconds to a minute later. This will last for days before finally turning on and working properly

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  • Televison & ... Master
  • 1,525 Answers

Hi this could be a capacitor fault or a dry solder joint, might best to look for tech in your area hope it helps

regards
shaun

Posted on May 18, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: Tv cuts off and green light flashes

If your set was manufactured around July 2005, you may need a firmware upgrade to solve this issue. On the Sony website you can enter your model # and serial # to see if you TV is affected. If so, it is easy to have done and may be free from Sony. It sounds like the issue they described in the writeup on the required formware update. I had mine done within few months of when i bought it (purchased in Dec 2005) and it has been working flawlessly since.

Good luck!

Donnieboy999

Posted on Oct 21, 2008

ginko
  • 19396 Answers

SOURCE: VIZIO HAS YELLOW POWER LIGHT BUT WILL NOT TURN ON

The TV is just on protect mode, and that means that any possible internal fault apart power cord can cause this.

To find the fault you need to test the tv, if you are experienced in repairs you can grab the service manual and followtroubleshooting diagrams to test the tv, starting from PSU, to LCD controller, mainboard, inverter, signal board.

Here is general troubleshooting:

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

Posted on May 04, 2009

  • 10 Answers

SOURCE: Vizio won't turn off

This could be a mainboard problem. Sometimes one of the fuses may be bad and may freeze up causing the TV to not be able to power off.

Posted on May 23, 2009

djchillsnyc
  • 151 Answers

SOURCE: Power is there, but TV won't turn on

stored voltages are high no touching these circuts becuase they hold charges and alot of screws.
fualty capacitors you say after a while it stays on theres a full charge in the unit theres some type of discharging effect on the set after its off for a while. voltage goes to low or unstable after it is off for a while. your better off getting the service docs for this set if you want to diy..other wise get a tv tech to check it for you. hope this helps

Posted on Jun 25, 2009

  • 556 Answers

SOURCE: Sony kdfe60a20 - The TV turns on but after a

classic Sony telling you the lamp is going bad. Replace lamp yourself it is consumer replacable.

Posted on Aug 11, 2009

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