Question about Samsung Televison & Video
Please could you tell us how to repair our Tv as we have lost the picture, but not the sound. Samsung model:LA40B650T1F MODEL CODE LA40B650T1FXXY TYPENO LA40B650.Await your reply Simon Rawlins
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Posted on Jan 02, 2017
SOURCE: Samsung LCD Tv
Access menu service by press on your command, with your TV OFF:
INFO + MENU + MUTE + POWER ON
Then you should get access to Service Menu.
The last item says: RESET
This will do a reset to the TV.
Make no harm.
WARNING: If when on service menu you feel tempted to "screw" on anything FIRST take note on ALL you change! You can compromise the TV ...
Posted on May 03, 2008
this could be one of two problem. first, check if you have back light. If you do then the problem is with the M/B. Second, if you don't have back light then the inverter is bad and needs to be replace.
Posted on May 20, 2009
I had this exact problem on my Vizio 47" HDTV. I removed the speakers and all the screws on the back cover. Took the cover off and located the fuses on the largest circuit board. The are in the upper right hand corner of the board. There are 3 of them in a row labeled LF 1.5, LF 3.0 and LF 3.0. The are white in color with copper ends. I took a volt meter and measured continuity across all fuses individually and found the LF 1.5 to be blown. The guy at the electronics store sold me a barrel 1.5A fuse and told me to soldier it across the top of the blown fuse. It took an extra set of hands but the TV works perfectly.
Posted on Jun 23, 2009
Sounds like the digital control board, 6871qch038a Lg Digital Control Module subs to 6871qch038c. But that's just a first something I would check in this unit. Replace also capacitor C19, 630V big blue square cap very common failure for no video. You might want to shop this one thee are a host of problems with this unit that would certainly get some needed attention if a qualified tech were testing it and looked up the bulletins.
William Rayburn, CET
Posted on Oct 05, 2009
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