Question about Vizio L32 32 in. LCD HDTV

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No power Got no 5 v. on "remote" terminal at P/S board when pressing power sw. Just 5 v. Low power supply voltage is present at P/S board output.

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  • Vizio Master
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On the power supply board there will be a connector that says PO which means power on from the main board. Make sure that goes High when you press the power button. Make sure your stby voltages are ok on the PS. If the PO goes High then the power supply needs repaired. A lot of the ic's on these boards are not available for us to buy, so you have to replace the board. If it doesn't go high then the main board is at fault, gets a little more tricky with that, but not impossible.

Posted on Jul 15, 2009

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Posted on Jan 02, 2017

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1 Answer

Getting 120 v to white plug where it first plugs into board should i have power reading at fuse?


yes after to the fuse you must have a reading of 120vac if none the fuse get busted. if the 120v is present then it will goes through the rectifier bridge diode and primary capacitor of the power supply board to have an stand by voltage at the power supply board. when you press the power button it will send signal voltage coming from the main board to turn on the power supply board. the you will need to get an output voltage at the power supply board of 5v dc, 12v-16vdc and 24v to turn on the all the circuit, the main board sound amplifier and the inverter board for screen back light.if you can get those supply the tv unit will not turn on.

Nov 09, 2012 | Vizio L37 Television

1 Answer

How to test the 4 output powersupply on the un55b8500 led tv


First, inspect the electrolytic capacitors on the power supply board. The top of a burned-out capacitor is often domed instead of flat. You may measure proper voltage with no load, but the bad capacitor will not support a load. (Note: the voltages are usually printed on the board next to the output connector.) The page linked below includes a nice illustration of both good and bad capacitors. Also, check the LED driver board for the same problem. If you don't see anything like that, add a comment to the post to that effect, and we'll look at other possibilities.

CapacitorLCDPARTS net

Jun 12, 2017 | Samsung UN55B8500 TV

1 Answer

I have a PDP 503 mxe that when you switch it on the stand by red light comes on. when i then press the remote to switch it on the grenn light comes on for a few seconds then goes out. the screen fails to...


That problem is usually have 2 causes..Its either power supply board or main board..

Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the power supply output is normal..The problem could be on the main board...
5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..
Hope this solution will be helpful..

Thanks for using fixya...

Jun 06, 2012 | Pioneer PureVision PDP-503MXE 50 in....

1 Answer

Tv shut off and now no image or volume


hi, the first step that you need to do is to check the power supply board this will require opening the back cover of your TV set.once the cover is remove you can immediately see the power supply board this is where the power cord is connected.visually check the components on it remove any bulge deformed capacitors,check the fuses replace the fuse if it is burned.test the power board after replacing the parts.use your multimeter to measure the power output there must be a 12v,5v 24volts present on the output terminal....If this voltages are present then your TV should be working again.....

Dec 28, 2011 | Vizio L37 Television

1 Answer

I plug in my tv with a 125v cable my tv and nothing happens.


Good day!Follow this D.I.Y procedures to find the exact problem of your TV.
  1. Remove the back cover of your TV.
  2. After that,find the power supply board.
  3. If you already found the power supply,plug-in your TV and power it ON.Check the input voltage of it,using multimeter (AC range).If the power supply have no input voltage the problem could be the power cord.Replace it.
  4. If the power supply have the input voltage,try to test the output voltage if have 5vdc for the system and logic supply,12vdc for the sounds and 24vdc for the back-light inverter.Use your multimeter tester (DC range) to test that.
  5. If the power supply have a voltage outputs such as 5vdc,12vdc and 24vdc and the problem is still there.The problem could be the main board.Replace it with the same type and model # because the main board is no very difficult to fix and its very sensitive.
  6. If the power supply have no output voltage or the voltage is too low,just ignore the step # 5 because the problem is not on the main board,its on the power supply board.
Check the following to fix the power supply board:
  • Fuse: Check the fuse if it is busted or blown.
  • Power transistor (regulator): Check the regulator if it is shorted or leak.
  • Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
  • Capacitor: Also check the capacitors if it is leak or bulging top.
NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

I hope this solution will be helpful.Thank you and good luck.

May 29, 2011 | Polaroid TLA-04011C 40 in. LCD TV

1 Answer

I have a LG Inverter Art cool and after about 5 minutes it stops and C5 shows on the panel Kerrie


Fault Code 05.
This fault code indicates a communication error between the indoor and outdoor units; this is usually caused
by wiring errors or condensate pumps connected to the inter-connecting cable.
The communication between the units is a fluctuating DC voltage commonly called a serial signal, it can be
easily lost if the wiring is not done correctly. If there is a communication error fault CH05 will appear within 5
mins of powering up the system.
Testing
• Check Outdoor and Indoor Power Supply Voltages ( 230V ±10% ) and correct as necessary.
• Check for any mis-wiring or loose connections and correct as required.
• Check the resistance between communication line and GND. (Normal: Over 2M).
• If one Indoor unit operates normally Outdoor PCB is generally normal.
Turn on the power and start the indoor unit in cooling, set the temperature to 18ºC; the serial communication
signal will only be present for the first 3 mins of operation.
Set your meter to DC Volts, Test between terminals 5 (Red probe) and 2 or Earth (Black probe) of the outdoor
unit, you should see a fluctuating 0-72 Vdc.
If the Voltage is not present disconnect the terminal 5 cable, test the Voltage between this wire (Red probe)
and 2 or Earth (Black probe), you should see a steady voltage in the range of -0.1 to -10.0 Vdc. If No Voltage
is present either the cable or Indoor PCB must be faulty. This can be determined by checking the voltage
output on the Comms terminal of the Indoor unit, with the Comms wire disconnected. If No Voltage is present
the Indoor PCB must be faulty, if present, cable must be at fault. Helpful?

Jan 19, 2011 | LG Art Cool LA121CNP wall/window Air...

2 Answers

TV won't turn on


the first thing that you need to do is to open the back cover of your tv.Go to the power supply section it is separate board where the power cord is connected.Using a multitester,plug in the power cord and measure for the output supply.see if the 5vdc ,12vdc and 24vdc are present..if one of this output is missing,replace the power supply board But if the output voltage are complete,replace the inverter board,It is a board that supplies the high voltage to the backlights of your monitor/screen....You can also try to reset the system of your tv by pressing the the small switch mounted on the main board press it twice while the power is on...tnx and good luck!


please vote for my help!

Jun 04, 2010 | Sharp AQUOS 52" Flat-Panel LCD HDTV

1 Answer

Attention to Expert: budmrtn Polaroid Expert


Hi SD Tech,
My replied is kind of late but It might be useful.
The voltage that should be present is the 5VSB on pin 2 of CN105 if you have the MLT0107AX power supply on your LCD. See the picture below to find the more info.

Let me know if you require further assistance.


5cbdf50.jpg

Jan 30, 2010 | Televison & Video

2 Answers

No power


Is the fuse located before or after the main power switch?

If the answer is before the main switch, then maybe you should also check the main power switch (dirty contacts - these may cause insufficent voltages from the power supply).

Note that the (electrolytic) capacitors can be faulty but will not have visible damage, so check the DC voltages on the power supply output and try to replace the associated capacitors if the voltages seem to be too low (usually, there will be 12 and 5 volts outputs, sometimes a 3 volt output on some brands/models).

If it turns out that these voltages are not present at all, then there may be damage to the transformer driver IC (i'm assuming this is a switching power suply) - see if there is any AC voltage present at the secondary terminals of the transformer, if there is none, then the primary is most likely not being driven by the 110 V and this points to the driver IC as the possible cause. It may also be some other component in the primary section, but you said you've checked them out, so i don't know what else to suggest.

Hope you can fix it.

regards

Triarcuate

Sep 29, 2009 | RCA DRC220N DVD Player

1 Answer

Behringer 3282 mixer


any luck with the test. Let me know here Id like to know how you got on.

regards
Graeme

Feb 10, 2008 | Behringer EUROPOWER EP2500 Amplifier

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