Question about Vizio L32 32 in. LCD HDTV

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My Vizio VW42L will not power on. No backlights, no power from pson pin. has 5v stand by power on power to main board. no 12 or 24 volt power. has a new power board and inverter boards.

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  • Vizio Master
  • 8,617 Answers

The main board is defective the power on command originates from the main board and thats what gives the signal to start powering up the set. Replacing the main board should solve the issue. You can get the main board from www.tvcircuitboards.com

Posted on Jan 03, 2013

  • Jonkyle Jan 05, 2013

    I have ordered it and waiting for it to come in. thanks

  • Jonkyle Jan 10, 2013

    The new main board is in. Now the tv has a new power board. two new inverter boards and a new main board. after fighting with it for the past 2 hours the vizio light will turn from amber to white when i push the power button and after 3 seconds the backlights will come on, pushing the menu or source button does nothing on screen. after about 5 - 10 seconds the backlights will shut off but the vizio light remains white.

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3 Suggested Answers

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Posted on Jan 02, 2017

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budmrtn
  • 11361 Answers

SOURCE: Vizio SV470XVT1A has no backlight

The 24vdc is turn on by the signal from the main logic board, it is not always on, the standby 5vdc is always on. So yes it can be the power supply board is bad, but just to besure we need to find out if it is getting the turn on signal from the main board first.
You can have 24vdc at the inverter board and it will not light up the CCFL until it gets the signal from the main logic board to turn the lamps on (this is the STANDBY condition, the TV is on but the screen in not lit up util it see the video signal).
Send me good clean and clear pictures of the power supply board, budmrtn@aol.com, connectors of the Power supply, bottom side of the board, then I may be able to tell you which pin is a control input pin. Most people will just throwing parts in and hope that they one of the parts will fix the problem. Used Power supply module for this TV is over $100. http://www.google.com/products?rlz=1T4GGIH_enUS282US283&q=delta+DPS-379AP&um=1&ie=UTF-8&ei=USsxTKn3J6TonQfFlJGEBA&sa=X&oi=product_result_group&ct=title&resnum=4&ved=0CCsQrQQwAw

http://www.shopjimmy.com/catalogsearch/result/?q=Vizio+SV470XVT+

Posted on Jul 05, 2010

Testimonial: "Bud helped me fix my TV! It was only 1 1/2 years old. I was looking at a repair bill close to $300 - $500 and I fixed it with a $60 board! Thanks!!!"

TV #1
  • 129 Answers

SOURCE: my 32" lcd vizio vx32L turns on there's sound

Have you tried the T-con board?

Thank you,


tv_1_7.jpg

Posted on Dec 18, 2010

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I want to convert this power supply for use with a battery charger for model aircraft. I need to know the color codes for the wires and also the pinout and which wire is the power on.


Pin Name Color Description
1 3.3V Orange +3.3 VDC
2 3.3V Orange +3.3 VDC
3 COM Black Ground
4 5V Red +5 VDC
5 COM Black Ground
6 5V Red +5 VDC
7 COM Black Ground
8 PWR_OK Gray Power Ok (is a status signal generated by the power supply to notify the computer that the DC operating voltages are within the ranges required for proper computer operation)
9 5VSB Purple +5 VDC Standby Voltage (max 10mA)
10 12V Yellow +12 VDC
11 3.3V Orange +3.3 VDC
12 -12V Blue -12 VDC
13 COM Black Ground
14 /PS_ON Green Power Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF.
15 COM Black Ground
16 COM Black Ground
17 COM Black Ground
18 -5V White -5 VDC
19 5V Red +5 VDC
20 5V Red +5 VDC

/PSON activated by pressing and releasing the power button while the power supply is in standby mode. Activating /PSON connects the power supply's /PSON input to ground, thereby switching the power supply to full-on condition.
18 AWG is recommended for all wires except pin 11, which should be 22 AWG. For 300W configurations 16 AWG is recommended.
There are several ATX variants.
Hope this helps.
If this helps you resolve your problem, please
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USE:CAUTION WHEN DOING THIS....
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