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After installing a new main board in my sanyo dp46848 it came on for like 2 seconds then went off and now it will not come on at all HELP!!!!!

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You have to do a firmware update after main board replacement. It is a must. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Posted on Nov 09, 2014

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Posted on Jan 02, 2017

Slapnuts1975
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SOURCE: Sanyo main board

Sanyo 1-800-877-5036

Or... www.shopjimmy.com for used parts.

Posted on Aug 06, 2008

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I have a Sanyo DP42746 and it is about 3 years old. Yesterday the picture went out, but the sound still worked. It went off for a minute and then came back on. It is starting to get worse in that it is...


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 the same issue with my TV last year.
The solution is almost always to replace the Power Board (Y-Main) 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.

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1 Answer

Hi, had a question about what you said, have a minute?


You need to replace the top and bottom y buffers when you replace the Ymain. If not, it will just go back out. If you have space, wire a 12 volt mini cpu fan near the left of the Ymain and the buffers, should last alot longer that way.

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i had a sanyo plc sw30 wich had the same problem and it turned out to be the bulb replaced it with new one and this seemed to solve the problem. Theres a few places to get new ones but they are not cheap looking at between £150 to £180 hope this helps

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2 Answers

TV WONT WORK


I was lucky to get a tv repair shop that was a Sanyo authorized dealer to talk to me about this issue.
They told me that they had 3 of these tv's in and they said they were all repaired by replacing "3" parts. they are:

the Y SUSTAIN Board - Part # LJ92-01200a
the Y-Upper Buffer Board Part # LJ92-01202a
and
the Y- Lower Buffer Board Part # LJ92-01203a

I am in the same boat. I amd going to rip the back of my tv off and verify the part numbers. I HAVE NOT REPAIRED MINE YET.. so take this for what it is worth. The Repair shop gave me this info because they were going out of business and did not intend to take any new tv's in for service. The girl who gave me this info read it out of the service repair tickets from 3 Sanyo DP42746 tv's that had the same symptoms as my tv.

Please post back if any one has taken action.

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