Question about Sanyo DP42746 42 in. Plasma Television

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Sanyo dp42746 no video or audio power light comes on

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  • lvfnchs May 28, 2008

    I have the same problem. Bought the tv 1/6/07 and suddenly the picture and sound don't work. The power light does come on.

  • datcat22 Aug 01, 2008

    I have the same problem. Have anyone had it fixed yet and if so how much did it cost??

  • caroleanne41 Sep 02, 2008

    my tv about 2years old and the power comes on and no picture or sound what can i do thank you carole



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Problem is on the Y sustain pwb, to the left of the power supply. To varify, unplug the connector from the power supply going to the y sus. The set should then start up, and you'll have audio. Call sanyo at 1- 800-877-5036 for parts. Or for used circuits at a discount price.

Posted on Aug 06, 2008

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Posted on Aug 08, 2008


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Posted on Jan 02, 2017

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SOURCE: Sanyo Vizon 42" Plasma DP42746 Was

EBC electronics has a repair service for set of these 3 boards.

Posted on Oct 14, 2010

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1 Answer

I connected my Mid 2009 Macbook Pro to my Sanyo DP42746 Sanyo with a minidisplay port to HDMI adaptor. My Macbook doesn't support sound through the minidisplay port. The TV owner's manual suggests...

It may have something to do with the settings under audio output devices. See if you have options, and ensure that the headphone jack (I assume that's what you're using) is set as the default sound device.

Oct 24, 2013 | Sanyo DP42746 42 in. Plasma Television

1 Answer

Power comes on but screen stays black

Hi Aaron,

Have you checked your connections? This is the first thing you must check. Audio video cables or coaxial cables can short out which could cause the issue. Is this a brand new tv setup or some recent issue.

Sep 03, 2013 | Sanyo DP42746 42 in. Plasma Television

1 Answer

Sanyo model dp42746 powers on but black screen and no audio

Clicking noise is usually produced by a shorted load or overloaded SMPS (power supply), black screen as you had mentioned may contribute to a short circuited load.Check voltages (secondary) might be pulsing from high to low that sync the clicking sound.Checking load resistance through filter capacitor will help a lot then try isolating circuit branches to localize the shorted or leaky parts.Try isolating(one at a time) the power supply's loads may help a lot.

May 26, 2012 | Sanyo DP42746 42 in. Plasma Television

1 Answer

I hook up my cables into the second and third video plugs and all i get is black and white screen but in the first plug on video 1 its color

Video1 is likely composite video, and left/right audio.
Videos 2 and 3 are likely YPbPr so your composite signal comes out monochrome!

Jun 21, 2011 | Sanyo DP42746 42 in. Plasma Television

2 Answers

The tv is not coming on. At first the green light comes on then the light turns red.

Check the inputs on your TV, are they correctly inserted? Is there a device connected to them? Try to change the input on your tv.
If this problem persists, it is your power supply failing, and your tv needs maintenance.

May 04, 2011 | Sanyo DP42746 42 in. Plasma Television

3 Answers

Sanyo Vizon 42" Plasma DP42746 Was using tv when I heard a click and I lost all audio and video, could not change the channel or adjust volume. Tried unplugging and sitting for 10 minutes. Plugged back...

This is a common problem with these TVs. You can download the official Sanyo repair manual for this TV (DP42746) at I uploaded it here when I had the same issue with my TV last year. The solution is almost always to replace the Power Board (Y-Main) and the Upper and Lower Y Buffers. The parts and costs (from Sanyo in July 2009) are listed below (NOTE: Sanyo will not ship these parts to anyone but a repair shop): 1. V4 Y-Main (Y-Sustain) Circuit Board (Part # LJ92-01200A, Alt Part # LJ41-02759A) - USD $139.00
2. Upper Y-Buffer Circuit Board (Part # LJ92-01202A, Alt Part # LJ41-02760) - USD $64.00
3. Lower Y-Buffer Circuit Board (Part # LJ92-01203A, Alt Part # LJ41-02761A) - USD $64.00
Sanyo charges USD $10.50 for shipping, which brings the total cost for parts to USD $277.50. From my research, a shop would probably charge between USD $500 and $700 to do this repair. FYI - there is a class action lawsuit pending against Sanyo for this issue. The V4 Y-Main (Y-Sustain) Circuit Boards fail VERY frequently in this TV due to overheating. Hope this helps.

Aug 03, 2010 | Sanyo DP42746 42 in. Plasma Television

1 Answer

Sanyo DP42746.Can't get tv to come on. The green power LED is on.

unplug the power connector to the tv, wait two minutes then plug it back in and try to turn on the set... this worked for me.

Dec 20, 2009 | Sanyo DP42746 42 in. Plasma Television

2 Answers

No video but audio is fine on Sanyo 42" DP42746 TV

If you unplugged the Ysus board, then you need to replace the Ysus board, or both sustain boards. This is the part: The part is often available on Ebay, or from manufacturer. Look also at Vance baldwin or Partstore. To do a good job the Sustain boards should be tested by a tech , following service manual. It is almost for sure sustain board by the way.

Oct 12, 2009 | Sanyo DP42746 42 in. Plasma Television

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