Re: LG 49LB5500 LED Backlight Problem..
Results are in!!!
First Wire (Blue)
Off: 66.8
On: 130-150
Second Wire (Black)
Off: 00.0
On: 15-26 (usually about 17)
Third Wire (Blue)
Off: 66.8
On: 135-142
Fourth (White)
Off: 0.00
On: 00.0 – 00.1
stedmund08
Member
Last Activity: 06-25-2017, 02:10 PM
Joined: 11-10-2015
Location: Suffolk
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Re: LG 49LB5500 LED Backlight Problem..
That's great - thanks for such a thorough response Budm!Leave a comment:
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Re: LG 49LB5500 LED Backlight Problem..
Where do I measure from? The two coils at the bottom?Leave a comment:
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Re: LG 49LB5500 LED Backlight Problem..
Hmm, they still look somewhat blurry on the screen.. Let me know if they're no good.Leave a comment:
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Re: LG 49LB5500 LED Backlight Problem..
As requested
...
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Re: LG 49LB5500 LED Backlight Problem..
Hurrah - found the cable... Now I just need to figure out where/what I'm testing? I assume I take the power supply board off and test the contacts on the rear? Or should I test on the T Con board?Last edited by stedmund08; 06-10-2017, 06:24 AM.Leave a comment:
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Re: LG 49LB5500 LED Backlight Problem..
Also, can't find the bloody power lead at the moment, hence I've not been able to report any results yet. Doh!Leave a comment:
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Re: LG 49LB5500 LED Backlight Problem..
Vince - no LED tester
just a multi-meter... Do I need an LED tester...?
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Re: LG 49LB5500 LED Backlight Problem..
Cool - what's/where's the best place to test the strings? At the power supply?Leave a comment:
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Re: LG 49LB5500 LED Backlight Problem..
Capleaker - That's great, somewhere for me to start!
Reecey - I'm not sure what that means, are you saying intermittend LEDs are a common fault with this TV?
Thanks allLeave a comment:
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Re: LG 49LB5500 LED Backlight Problem..
Sorry! Computer froze whilst downloading from my camera.. Take 2! (and hello again )...
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LG 49LB5500 LED Backlight Problem..
Hi All,
So... It's been a while since I was here and it seems all the knowledge I thought I had has gone and I'm totally at a loss (I've been searching all night too). So.. I thought I'd ask here and see if anyone can kick me off and point me in the right direction
I've got an LG LED TV and the backlight keeps flicking on-and-off. It comes on for a second and then off for 5 and on for a split second and off...
I've looked around the board and can't see any bulging caps, tried to fiddle with settings etc and got nowhere..
I'm assuming... -
Re: Samsung LE46B530P7WXXU confusing backlight
Any suggestions? ��Leave a comment:
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Re: Samsung LE46B530P7WXXU confusing backlight
Here's a photo of the tabs I was trying to test......Leave a comment:
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Re: Samsung LE46B530P7WXXU confusing backlight
Is it normal that when testing the gold tabs/points along the balancer board... Will upload a pic, that the backlight shorts? Touching any point seems to force the backlight to instantly shut down? I thought perhaps this was a safety feature because there would be a very slight change in voltage but I started wondering if perhaps this was indicative of another problem?
The caps seem to be holding roughly the correct voltage when charged - will check again shortly and give you the readout.Leave a comment:
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Re: Samsung LE46B530P7WXXU confusing backlight
budm - thanks again!!! I will be sure to check out those (also, I did try searching around myself, honestly, but thanks for finding that info for me).
I'll let you know how I get on tomrrow (it's 2am here)Leave a comment:
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Re: Samsung LE46B530P7WXXU confusing backlight
Here... I can't find replacement parts for any of the the four transformers here... They're labelled as 'LP' on the board.....Leave a comment:
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Re: Samsung LE46B530P7WXXU confusing backlight
I'm assuming the bottom two are transformers too - they look like them..Leave a comment:
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Re: Samsung LE46B530P7WXXU confusing backlight
YeahLeave a comment:
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Re: Samsung LE46B530P7WXXU confusing backlight
Similarly the bottom two transformers (white tops - below the two large caps) the upper one gets significantly hotter than the lower..Leave a comment:
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