Question about Sanyo Televison & Video
Could be the power supply board. If there are no lights at all This may be the issue. For about 50-75 bucks you should be able to
buy a new one. If you are handy and can solder is is most likely
blown capacitor "caps". Very cheap fix a couple of bucks, but be careful a capacitor disharge could knock you on your can or in a really bad situation kill. Not kidding. First always look for a reset button or blown fuse.
Posted on Nov 23, 2014
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Posted on Jan 02, 2017
Sounds like the digital control board, 6871qch038a Lg Digital Control Module subs to 6871qch038c. But that's just a first something I would check in this unit. Replace also capacitor C19, 630V big blue square cap very common failure for no video. You might want to shop this one thee are a host of problems with this unit that would certainly get some needed attention if a qualified tech were testing it and looked up the bulletins.
William Rayburn, CET
Posted on Oct 05, 2009
For what it's worth, you can download the official
Sanyo repair manual for this TV (DP42746) at http://www.eserviceinfo.com/downloadsm/43343/sanyo_dp42746.html.
I uploaded it here when I had some issues with this TV last year.
The solution almost always seems to be to replace the Power
Board 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.
Posted on Aug 07, 2010
I had this same problem this morning. Luckily, when I reset the whole thing and did the channel search again the sound returned. I have no idea why it fixed it but it did. Hope this helps you.
Posted on Oct 11, 2010
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