Question about Sanyo DP42746 42 in. Plasma Television

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Sanyo DP42746 Plasma

My tv was acting up with going black with audio you shut it down for 10 min. and it runs ok but this time it went to a color screen then went black now it don't come back on and has no audio

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  • rmvx Oct 06, 2008

    My TV was working fine one day the next it was completely black with no sound. Now has been that way for a week

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  • Sanyo Master
  • 5,568 Answers

If it just fails to turn on, the main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself. 
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.

 
Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.  
 
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.

Posted on Oct 01, 2008

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

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