Question about Sanyo DP42746 42 in. Plasma Television

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Sanyo DP42746 - Screen went black and no sound. Power light on.

I bought it brand new in December 2006 from Walmart. It's out of warranty. I was watching TV when the screen went black and no audio. I tried accessing the TV's menu using the remote and it doesn't display. The green power indicator still lights.

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  • Sanyo Master
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The TV is on protect mode.

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

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

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

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 , startingthe flashing light.


If you are in situation one, then theTV 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.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

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.

Posted on Jun 16, 2009

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  • Contributor
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Same problem everyone is having. I had the same problem.
If you want to be included in the class action please contact me

danimimozi@gmail.com

Posted on Jun 20, 2009

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1 Answer

Our sanyo dp42746 went black made a pop sound and would not turn back on no power light or nothing


Most likely a power supply board went bad. the pop sound is bad capacitor on the board. Most bad capacitors will look like this: 18976c2.jpg
The other picture below shows a normal capacitor in the middle, but two bad capacitors on the sides of it. One with the dome top and one leaking. 5d53c3a.jpg

You can try repairing the board by replacing the capacitors or replace the whole power supply board. Most replacement boards can be found at a good price at Shopjimmy.com or Ebay.

Dec 29, 2009 | Sanyo DP42746 42 in. Plasma Television

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Dead relay(?) on dp42746 is this common.


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No sound and black screen


lets get together, start a list of names and sue companies selling crappy wares at way too high prices! email saryejade@aol.com

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Sanyo Plasma Tv Black screen


I've had the same problem main board went out it's a 100.00 part fixed myself.

May 03, 2008 | Sanyo DP42746 42 in. Plasma Television

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Dead relay(?) on dp42746 is this common.


Ok Fellas I found the Problem!
The Problem is the V4 Y-Main Board. This board is located on the left side of the case looking upright from the back. I spoke with may suppliers, and Sanyo all confirming this. Apparently it has been an issue for some time. Sanyo has replaced the V4 Y Main board with a W1 Y main board in newer models. The W1 Board is NOT compatible for us tho. Just to be sure... If your T.V is taken apart (like mine) Disconnect the peripheral cable from the V4 Y Main, and turn on the set. I bet it will power up with audio and channel function just NO picture. When you plug the board back in... POOF set shuts down. Replacement boards are VERY hard to come by. So Happy Hunting!

42' HD V4 Y-MAIN
PCB: LJ41-02760A LJ41-02761A LG92-01200A BN96-03352A

Oh yeah.. just FYI, Sanyo, Phillips, and Samsung all use the same parts. Hopefully that will help your searching.

Nov 18, 2007 | Sanyo DP42746 42 in. Plasma Television

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