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Equipment Repairs => LCD TV forum => Topic started by: mykeie on July 09, 2009,06:50:19

Title: Samsung lcd tv 40" broken
Post by: mykeie on July 09, 2009,06:50:19

Hi there i have a samsung lcd tv model LE40M86Bd.  yesterday when the tv was on the picture started to flash on and off so i unplugged it and left if for a while when i turned it back on it was ok. i turned the tv off last night and this morning turned it on and the picture is flashing agian on and off and will not stop now. i have taken all the connected equipment out and just tried the tv only and still the same problem? can anyone tell me the fault and can i fix it myself?
thanks
mykeie

Title: Re: Samsung lcd tv 40" broken
Post by: mykeie on July 14, 2009,08:16:19

if nobody can help with the fault is there any where i can go to get an answer?
thanks

Title: Re: Samsung lcd tv 40" broken
Post by: Contrast John on July 14, 2009,11:35:34

Hi mykeie
This type of problem is usually caused by faulty electrolytic capacitors on the power board. The faulty ones usually have domed or split tops.
Regards
John.

Title: Re: Samsung lcd tv 40" broken
Post by: mykeie on July 14, 2009,15:32:29

many thanks for the reply. what is the best way to repair this problem with the electrolytic capacitors on the power board and is it a simple fix?
thanks
mykeie

Title: Re: Samsung lcd tv 40" broken
Post by: Contrast John on July 14, 2009,17:31:32

Hi mykeie

The suspect capacitors are in one corner of the board and are usually 1000Mf 10Volt types. Remove the circuit board and de-solder them. Replace them with (solder in) 1000Mf 35Volt types observing correct polarity. Re-assemble and hopefully set should work.
Good Luck

John.

Title: Re: Samsung lcd tv 40" broken
Post by: greymatter on July 17, 2009,16:22:59

It might also be an invertor breaking down, had the same symptom on my Haier and sure enough one invertor went open circuit and i was left with a one second flash of blue screen then nothing.