I acquired this tv with out any knowledge of what the problem was. I plugged in and had no power. Opened it up checked the caps and fuses. Caps looked good. First fuse closes to power plug was good. Second fuse was blown. I swapped it and it plugged the set in and it immediately blew. Where do i look next?? attached is a picture of the board with the fuse that is blown circled in red.
Samsung LN40B550K1F no power
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Re: Samsung LN40B550K1F no power
I'll supply this circuit diagram and hopefully the real experts will chime in for you. -
Re: Samsung LN40B550K1F no power
Most likely QP801 and 802S shorted. Shoddy soldering casused this most likely. Thanks ROHS lead free solder!Did I leave the soldering iron on?Comment
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Re: Samsung LN40B550K1F no power
Check your diodes and transistors too, see if any are bad. Testing video https://www.youtube.com/watch?v=i4jTHhXuKLAComment
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Re: Samsung LN40B550K1F no power
+1 for shorted transistors. See my post here https://www.badcaps.net/forum/showthread.php?t=67743Comment
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