Question about Televison & Video
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Posted on Jan 02, 2017
SOURCE: No picture and No sound
I have the same problem here with my Philips 30PF9946/37
I'm not sure this can be diagnosed as an inverter failure, unless there is a another inverter board in there I'm not aware of. The only inverter I found (actually two) in this unit is the pair of KLS300A1 inverters which drive the CCFL tubes.
Since I personally get a green power and light AND the CCFL backlight comes on, it seems unlikely that the inverters have failed.
Would love to hear from anyone who can ident the failure in these units - there's certainly a LOT of these around that have failed in exactly the same way.
Posted on Mar 16, 2008
One of your CCFL tubes inside the monitor is broken.
This causes arcing at the connector to the powerboard of the CCFL tube.
It would of suffered a drop etc in transit for this to happen. It is extremely rare they just break like that new.
Contact your place of purchase, and they should be able to arrange a swap immediatly.
Posted on Apr 19, 2008
SOURCE: LCD TV SOUND BUT NO PICTURE
Faulty parts on PS board , bad press for Samsung
Because the Samsung LNS4051D would not turn on and the power LED would blink 4 times and the relay would click and this would repeat again and again. I replaced power supply board parts CM806, 811, 812 & 817, all 1000 uf 10v capacitors, three had their tops bulged up slightly that I missed on initial visual inspection. After seeing the reports of problems with these caps on http://www.fixya.com/support/t1336881-will_not_turn_or_off , I replaced them with Radio Shack part 272-1032, 1000 uf, 35v. They are slightly bigger, but fit OK. TV is working fine now. Cost was 4 x $1.59 = $6.36 plus the time. I saved between $100 to 300 in the process of either replacing the board or getting the unit serviced.
Posted on Jan 01, 2009
when ours went the repair man went over boards on back with magnefying glass and replased 2 capacitors that had blown £20.00 he charged us
Posted on Jun 19, 2009
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