Question about Sony KDL40EX400 40 in. HD-Ready TV
Th e picture is coming and going but the sound is constant.
Posted by Anonymous on
In most of the case, the problem is a LED back lights strip problem.
Posted on Oct 30, 2017
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Posted on Jan 02, 2017
SOURCE: Sony Bravia KDL-40S2000 40 inch
We have the same problem.. Checked the Sony site after a few clicks got to: http://www.iq.sony.com/SRVS/CGI-BIN/WEBCGI.EXE/,/?St=966,E=0000000000761838071,K=1708,Sxi=1,Case=obj(460991),VARSET_OBJ=460991,VARSET_TSRC=results,UseTemplate=case.tem,VARSET_TOP=TRUE
We followed the 'simple' troubleshooting tips then called the service center. As mentioned above 4 blinks indicates a bad panel. The repairman that visited said that he is ordering a new power supply (much cheaper than the back panel) for their first try. I will post again when my set is back on.
Posted on Dec 22, 2007
Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.
To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).
Posted on Oct 07, 2009
That symptom may cause by the main board or t-con board, I suggest you do software up grade first.
Posted on May 07, 2010
Tips for a great answer:
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