Question about Sanyo DP50747 50 in. Plasma TV
I would not jump to conclusions just from that symptom, but I would agree that the power supply board is a strong candidate for this type of problem.
In reality it is also possible for almost any other board to be the source of the problem, probably the main board being the first candidate after the PSU.
On a side note, there are several different sub-versions of the DP50747 model, something that is NOT reflected in the fixya's model categories; the differences between the different versions can be from minor to significant.
Before getting your board you *need* to either look up the sub-version (called "chassis" on the label at the back of the TV) or, better yet, open up the TV and look up the power supply board markings in it.
Lastly, here's something that may help:
Posted on Mar 08, 2014
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Posted on Jan 02, 2017
Your reported symptoms are odd in that most failures are related to the primary power supply but that takes down both audio and video.
The backlight is obviously working (white screen) but it is no longer receiving any video information and this points to a failure of the logic (or the output of the power supply that services logic) used to control pixels on the screen. Some screens have the majority of the control ICs actually mounted on the LCD assembly and because of very close pin distances used on dense ICs, they are often not replaceable by hand since they were installed by robotics.
I would first suspect (and hope for) the logic voltage output of the power supply to be the culprit.
If any of you posters have had a repair done and received any kind of a detailed report (you should), would you be kind enough to post it back as a comment to this original message?
Posted on Jan 16, 2009
I am a military spouse and our Sanyo 42 inch plasma tv just decided to die on Super Bowl Sunday 2009, and was only a few years old. We did everything we know to do: call the company, called the repair man, etc. There apparently isn't a solution to this that wouldn't cost more than the tv is worth. So I got an attorney to start a class action:
If you would like to be compensated for your TV, if it is the same model and you have the same problem (just abruptly stopped working) please contact me @
Posted on Jun 24, 2009
Power surge will knock out picture and sound if you don't have a power strip. Found out from Best Buys when purchasing another LCD TV. They have a warrenty against such problems.
Posted on Feb 12, 2010
If your Tv is in warranty or you have a cover plan, you need to return the Tv for repair or replacement.Your Tv sounds like it has a power supply fault.
Posted on Feb 28, 2010
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