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Equipment Repairs => PLASMA TV forum => Topic started by: gangerlv on February 13, 2012,10:56:20

Title: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: gangerlv on February 13, 2012,10:56:20

Hi,
got Samsung PS-50q97HD Led flashes and stays on, but no picture. Opened up and there was C4712 popped. Replaced that and still nothing. Got green led on Ysus. All the fuses ok, had a quick look no shorts on X-main board.
Does anyone has any ideas?
This is my first plasma, dont have much clue whats were :)
Cheers
Arthur

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: t1412 on February 13, 2012,18:25:14

hello m8, i've got 1 of these myself i found the same fault.   you may find that some of the fets on the y sus board are short circuit and the buffer boards are burn't out these are located on the left hand side  of the tv as you look from the back you can buy a repair kit for the board but you will need new buffer boards. you can  spend a lot of money on this just to find  out that the screen as burn't out sorry

regards
shaun :c023:         

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: gangerlv on February 14, 2012,02:01:33

Thanks, i will have to check on y board.
Can the screen burn out in 4 years? I dont like plasmas allready - lcd'd are so much easier to work on.
cheers

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: gangerlv on February 14, 2012,16:26:15

You were right, 2 fets on y board are short 88n30w.

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: gangerlv on February 14, 2012,16:42:51

And yes, Upper buffer board has burned chip. If i knew that pdp is ok, then its worth repairing, but...

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: gangerlv on February 22, 2012,16:00:49

Ok, replaced one buffer ic and a fet. Got picture, 1/5 of screen and not very clear.
Any thoughts?
And screen seems to be split right in the middle, one side darker than other.

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: mzone on February 25, 2012,09:39:39

the buffers are still bad. you will need a new top & bottom buffer mate as they are common to failing. these are what caused the y-sus to blow.

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: Tellyfix on February 29, 2012,15:30:55

If the y-sus has been checked and is OK just replace the upper y-buffer and all will be ok. done several of these sets and the panel is usually ok. just inspect it using an illuminated magnifying glass carefully, looking for distinctive burnt out pixels....

Title: Re: Samsung PS-50q97HD Led flashes and stays on, but no picture
Post by: gangerlv on March 01, 2012,07:50:03

Damn you, i bought lower y buffer - it was cheaper. Will put just lower one in and test the set.