Question about Sanyo DP42849 42 in. HDTV

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Sanyo DP42849 no picture but has sound

Tv made squilching noise for bout week then pic went black. has audio but no pic, green power light is on. which board is bad, power board, av board or inverter board? when i turn on tv i can see a pic light up for about a milla second then black, help : [

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  • Sanyo Master
  • 933 Answers

Sounds like an inverter problem. On some of these sets, the inverter and the power supply are on the same board. These boards tend to be quite pricey, $100 + range. I've worked on your particular model with the same problem, and it was a bad inverter/power supply board. I would recommend you get a diagnosis to be sure.

Posted on Oct 29, 2012

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Posted on Jan 02, 2017

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SOURCE: Sanyo LCD TV DP32746 no picture

Easy way to Diagnose is get a known good CCFL from a laptop or LCD TV and start plugging it in to the existing Cathode's Ports one at a time. Generally its a bad CCFL on these multiple units.. (2,4,6) Bulbs.. Moniserv.com for replacements.

Goodluck guys!

Posted on Apr 04, 2008

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SOURCE: Sanyo Plasma Tv Black screen

I had the same problem and Sanyo does not make parts for this model anymore. Luckily I had the extended warrantee so they reimbursed the full purchase price.

Weird that the poster above mine was able to get a part; I was told the part is no longer available.

Posted on Jun 16, 2008

  • 135 Answers

SOURCE: screen went black on my 42" sanyo model dp42647 lcd

Hi there! The panel may be in protection mode. The Inverter board is the most logical area to start after checking power supply Voltages.(5,6,24 and 13Volts). There may be coils on the Inverter Board which have bad soldering or faulty. Other than this it may be main board which controls switch on or off. If all else fails, refer to a repairer. Beware of High Current!!! Best Wishes and Good Luck, Jus004

Posted on Aug 23, 2009

  • 8457 Answers

SOURCE: hello my Sanyo dp42849 42 inch has no picture and

The power supply board is dying.That the board,where the power a/c cord plug into it.That the power supply board.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Posted on Jul 16, 2010

  • 8457 Answers

SOURCE: last night watching tv, picture cut off (black

Power supply board is dying not giving the tv correct voltage anymore.The power supply board,that the board power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Posted on Sep 10, 2010

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Most likely the power supply board needs to be replaced. It could also be the T-con board or less likely the display itself.

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I realized my Sanyo tv post may have been confusing.


There always is the possibility that the replacement power board is defective.

Aug 26, 2017 | Sanyo DP42849 42 in. HDTV

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Sanyo DP 42849 42'' lcd tv no audio no video


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Jul 03, 2017 | Sanyo DP42849 42 in. HDTV

1 Answer

I have a sanyo dp42849. i turned it on this morning. the power light went on and i have no picture or sound


Sounds like a main board issue, but please have the set diagnosed properly. Be aware, some Sanyo main boards can be hard to find and costly !!!

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