Samsung LE40A686M


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Samsung LE40A686M

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Mjh
New User

Sep 22, 2012, 4:18 PM

Post #1 of 8 (1802 views)
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Samsung LE40A686M	Can't Post

Hello,

My Samsung seems to have developed a strange picture, it's fine on the left hand side but wobbles on the right hand side.

I've taken a photo but can't seem to upload it, I've resolderred all the joints on the board that feeds the back lights and I've checked all caps and replaced one that looked fine but I replaced it anyway.

All connections from and too the TCon board have been cleaned and I am now lost as to what to try next.

Could it be that one of the power transistors needs replacing and if so which tend to fail.

Many thanks in advance for any help.

MJH

Mjh
New User

Sep 23, 2012, 9:21 AM

Post #2 of 8 (1782 views)
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Re: [Mjh] Samsung LE40A686M [In reply to]	Can't Post

Just uploaded a 2 second clip to YouTube so you can see the fault, it's in the conservatory so please ignore the reflections outside.

Hope someone can help

Thank you
http://www.youtube.com/watch?v=DsRa1Qb4Ajw

Mjh
New User

Sep 24, 2012, 9:17 PM

Post #3 of 8 (1767 views)
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Re: [Mjh] Samsung LE40A686M [In reply to]	Can't Post

And I read that 99.99999% of people got help!

Ron.M
Veteran

Sep 24, 2012, 10:51 PM

Post #4 of 8 (1764 views)
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Re: [Mjh] Samsung LE40A686M [In reply to]	Can't Post

Mjh......

It looks like you're in the 0.00001 % that didn't.... Unsure

....
Perhaps putting a link to your eBay business webpage may have had something to do with it...

Later...Ron.M.... Cool

...
Veteran & Retired TV technician

(This post was edited by Ron.M on Sep 24, 2012, 10:53 PM)

Mjh
New User

Sep 25, 2012, 8:53 PM

Post #5 of 8 (1752 views)
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Re: [Ron.M] Samsung LE40A686M [In reply to]	Can't Post

Ron,

Many thanks for your reply, I didn't realise that would stop people replying, I have now deleted my signature.

Crazy

74f100
Enthusiast

Oct 3, 2012, 8:39 PM

Post #6 of 8 (1715 views)
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Re: [Mjh] Samsung LE40A686M [In reply to]	Can't Post

Looks like panel de-lamination. Does it get better after running for 30 min or so?

Jim
HDMI not working

Mjh
New User

Oct 3, 2012, 9:47 PM

Post #7 of 8 (1713 views)
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Re: [74f100] Samsung LE40A686M [In reply to]	Can't Post

Hi thank you for the reply, it's very intermittent, if I unplug and rep lug one of the Tcon connectors it fixes the problem.

Sometimes it will be faulty on switch on and sometimes it takes a while to go faulty.

Any thoughts, I've changed the inverter board and the fault still exists.

Many thanks

74f100
Enthusiast

Oct 4, 2012, 12:21 AM

Post #8 of 8 (1711 views)
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Re: [Mjh] Samsung LE40A686M [In reply to]	Can't Post

It is usually in the panel itself.

Look over this article I did on the same issue, check the pictures about half way down and see if that looks like your screen. The demonstration set I used was a Sony, but it uses a similar panel as your Samsung.

http://television-tech.com/QandAblog/lcd-panel-fix/
HDMI not working

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