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Posted on Jan 02, 2017
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
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
You either have failed 24vdc power supply section or failed backlight inverter board, check for 24vdc first, look for caps with leaking/bulging top.
Posted on Jun 13, 2010
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