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Equipment Repairs => LCD TV forum => Topic started by: kennyc on June 29, 2017,12:37:35

Title: SAMSUNG UE48H4203AK NO PICTURE GOT BACK LIGHTS
Post by: kennyc on June 29, 2017,12:37:35

Hi gents ,have this set and it is only 18 months old .Have back lights and sound but no pidcture . Does not seem to have a separate Tcon board . It all goes into the long panel attatched to the screen. Have attatched pic . The surface mounted fuse has gone o/c, 12V going into board  and the screen side reads s/c to earth . If I short out the fuse the backlights go off . Just wondered if anybody has had this fault before or is it a throw away set . If they are doing away with the Tcon boards and attatching them to the screens without plugs its just another nail in our coffins I am afraid

Title: Re: SAMSUNG UE48H4203AK NO PICTURE GOT BACK LIGHTS
Post by: downunder on June 30, 2017,03:51:33

Hi Ken, T-con may be incorporated on the main board, but fault will be on the buffer board (pix 3), so you're basically screwed. Only hope is if you can trace a short on that board, perhaps one of the smd caps, but that would be fun.                            Bruce

Title: Re: SAMSUNG UE48H4203AK NO PICTURE GOT BACK LIGHTS
Post by: bonesy on June 30, 2017,04:20:13

Are the connections to the screen on plugs or are they bonded to board,that way you could eliminate the screen,most likely a  SMD cap I bet.

Title: Re: SAMSUNG UE48H4203AK NO PICTURE GOT BACK LIGHTS
Post by: kennyc on June 30, 2017,04:38:53

Thanks for your ideas Bruce and Bonesy . The diode reads s/c as do all the caps in pic 3. The cables to the screen are bonded at both ends of the board . Its just the same cables as when you have to change the LED strips you have to avoid moving to much . Reason I thought the Tcon was built into this board is that the diode and fuse look the same as you get on a Samsung Tcon board . Dont want to start soldering around because customer may want it back and try to claim on insurance for a broken screen. Will let you know if I get any further forward . Thanks again

Title: Re: SAMSUNG UE48H4203AK NO PICTURE GOT BACK LIGHTS
Post by: kennyc on July 01, 2017,06:33:44

Hallo Bruce and Bonesy ,just an update. Customer told me to keep TV so did a bit more investigating . Pushed the middle of the 3 sm caps and the middle one split in half . Cleaned it away and short gone . Replaced fuse and TV working fine . Didnt replace cap but will run for a couple of days to see what happens . Thanks for your help

Title: Re: SAMSUNG UE48H4203AK NO PICTURE GOT BACK LIGHTS
Post by: downunder on July 01, 2017,23:48:44

Well, there you go, Ken. The devil looks after his own.

Bruce