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SAMSUNG UN40F5000AF - Dark Half Screen    
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sonny4040



Joined: 07 Dec 2015
Posts: 2
Location: Chicago
PostPosted: Mon Dec 07, 2015 1:17 am    Post subject: SAMSUNG UN40F5000AF - Dark Half Screen Reply with quote
Hi all,

Samsung UN40F5000AF
40" TV

I have had this TV for three years. A few months ago, I noticed a dark portion of the screen. It is dark in the upper half, however still bright about an inch inside the frame. It looks like a glowing dark box (see picture). After searching a number of forums, I wasn't quite sure whether people were having the exact same problem as I was.

I have tried bending the frame back and forth as others have suggested. I am at the point where I want to open the frame up to see what's going on inside, but I was hoping you all could help me find out exactly what I'm looking for when I do that. Thanks in advance.

-Sonny

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JTS1957



Joined: 21 Jan 2009
Posts: 2394
Location: Far, Far Away
PostPosted: Mon Dec 07, 2015 2:48 am    Post subject: Reply with quote
http://www.cnet.com/news/led-lcd-backlights-explained/
kuhurdler



Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS
PostPosted: Mon Dec 07, 2015 12:58 pm    Post subject: Reply with quote
Yep, you have a few strands of backlight LED that have failed.

If this is the model I am remembering, if one LED fails, the whole string fails horizontally. I think the top two strands are also in series so if any one LED on either strand dies, both strands go dark.
sonny4040



Joined: 07 Dec 2015
Posts: 2
Location: Chicago
PostPosted: Mon Dec 07, 2015 4:36 pm    Post subject: Reply with quote
Thanks for your help, guys. Probably not worth getting it repaired, correct?
JTS1957



Joined: 21 Jan 2009
Posts: 2394
Location: Far, Far Away
PostPosted: Mon Dec 07, 2015 4:47 pm    Post subject: Reply with quote
Unless you're good at careful disassembly of panel.

Make sure the LED back light settings are lowered from 100% 'Default' on your next one.
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kuhurdler



Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS
PostPosted: Wed Dec 09, 2015 8:03 am    Post subject: Reply with quote
It's all just a matter of your perspective. I'd gladly repair this one.
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