Re: Lg 42LE4500 losing backlights
Ok took a trip to maplins and got a .06w 10k resistor.
Fitted it to pin 44 and put the set back together. The leds did nothing at all :-(
So I stripped her down to remove the resistor ready to clean things up for my new ic that I've ordered from China (will be here some time 2070 lol) and I broke the leg off the ic. Bugger but still not a problem as the pad was untouched as I'd dried the pin off.
Pics to follow
Greasejunky
Member
Last Activity: 12-01-2016, 08:07 AM
Joined: 11-25-2016
Location: Norfolk
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Last edited by Greasejunky; 12-01-2016, 08:07 AM. -
Re: Lg 42LE4500 losing backlights
Awesome, thanks very much.
Trip to maplins coming up
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Re: Lg 42LE4500 losing backlights
Sounds good, will give it a goLeave a comment:
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Re: Lg 42LE4500 losing backlights
I appreciate your efforts thank. I'm full of flu so a bit like a bear with a bad tooth.
Not only that but it's full blown MAN FLU lol
The smaller ic seems ok, I'm going to try and replace the larger ic and see if it helps.
I've found one on eBay in china so should be able to update the results in around 6 weeks.
Failing that I'm very interested in running this sets leds at the lower voltage by removing the board altogether. Hopefully the guy who figured that out could give me some pointers.
...Leave a comment:
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Re: Lg 42LE4500 losing backlights
Sorry guys.Leave a comment:
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Re: Lg 42LE4500 losing backlights
Can't fine the correct one.
I've linked some threads but I'm getting the feeling newbies aren't that welcome?
I'm a mod on another forum for mechanical issues. Maybe I'll stick with that lolLeave a comment:
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Re: Lg 42LE4500 losing backlights
Can anyone help me?
#all by my self......Leave a comment:
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Re: Lg 42LE4500 losing backlights
Can anyone explain why adding a 10k resistor from pin 16 to ground could work?Last edited by Greasejunky; 11-26-2016, 04:00 PM.Leave a comment:
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Re: Lg 42LE4500 losing backlights
So the larger ic chip is AS3693B 1018VAB
I think this is used to control the dimming? When the set starts to auto dim is when the leds shut down.
The smaller ic is MEGA4BPA or possibly MEGA48PA AU 1022
ThanksLeave a comment:
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Re: Lg 42LE4500 losing backlights
Thanks, do you know where I can get an ic for this set?Leave a comment:
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Lg 42LE4500 losing backlights
Hi all,
Mechanic from Norfolk trying to keep his old tv alive
I've lurked around for a while and read up so much my head hurts and now I have a couple of questions.
Symptoms:
Tv starts and shows logo. Sometimes the backlights will stay on for around 10 seconds but mostly around 2-3 seconds.
I've done the flashlight test and can see the screen and menus etc.
What I've done so far...
With a flashlight I've gone through the menus and reset to factory settings. No fix.
Stripped the set and looked for...Last edited by Greasejunky; 11-26-2016, 12:07 PM. -
Re: LG 42LE4500, Int No Backlights...
Would like to know more about this if possible?
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Re: New Members - please post your introductions here
Hello!
Mechanic from Norfolk in the uk.
Here to learn and hopefully fix a few things along the way.Leave a comment:
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Re: LG 42LE4500, Int No Backlights...
Hi,
Thanks for your informative posts on this issue.
My 4500 is now doing the same and I too have narrowed this down to the ic. Now I'm not an electronics guru like many of you! I'm a lowly mechanic but I do enjoy fixing things and saving money!
I read your post with interest on removing the driver board and running a feed directly to the LED strips. As the tv is in the bedroom I would be perfectly happy with the lower brightness caused by the voltage drop.
Could you please...Leave a comment:
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