Question about Sanyo DP42746 42 in. Plasma Television

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Hey,TV died all of sudden and had a tech tell me thinks it needs a power supply . I've fixed monitors and some older TV, so i pulled the back . I ohm'd all the fuses and are good ,also checked all caps and there all good. TV has no pic or sound,green power light lights up and do here a relay click likes it trying to start and then clicks off . I'm suspect the main power supply board ,bur wonder if maybe the relay on this board ?

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  • Sanyo Master
  • 76,237 Answers

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.
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Posted on Jun 29, 2017


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Posted on Jan 02, 2017


Bud Martin

  • 11361 Answers

SOURCE: Lightning strike nearby caused momentary power

Main AC fuse is encased in the black shrink tubing, labeled with Fx next to two pin white AC input terminal;

Please see my basic troubleshooting guide here:


Posted on Jun 17, 2010

Chi Chu

  • 8457 Answers

SOURCE: hit by lighting replaced power supply board same

When massive power surges to the tv.The tv Tuner signal board have 50/50 chances also dead too.In ur case it did.That the board,where the incomming broadcasting signal cable plug into it.Tries websites like, to buy a refurbish tv Tuner signal board for the replacement.

Posted on Dec 31, 2010


  • 22 Answers

SOURCE: Sanyo DP50747 Replaced Power Supply still not working

this issue is related to either the y sustainer and z sustainer boards, checking the fuses on the y/b will giving you a good indication, if they are open(bad) then you'll have a easy fix, if not, i would try replacing the y board first.

Posted on Apr 16, 2011

SOURCE: Hey,trying to determine which is

Main power supply unit

Sub power board
feel free to email me @ if you need more help

Posted on Sep 24, 2011

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