Re: Faulty 42LG3000 Help!
(kicking up older thread) Found 5 broken ccfl tubes on mine. causing it to turn of after a few seconds on high backlight. will stay on 15% tho.. anyone knows where to find those for a nice price ? or a rebuilt to lcd kit ?
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Re: Faulty 42LG3000 Help!
My customers LG 42LG3000 sets picture was cutting out after 30 secs. In my cold workshop it stayed on for ages but I can see 3 faint lines across screen where - I assume - the ccfl tubes are low emission. Are these tubes available. ThanksLeave a comment:
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Re: Faulty 42LG3000 Help!
OK, but he have black screen, my screen is white, ok, no problem finally i resolve that, i put on the left side corner some sponge and all problems disappeared.
Now yhe tv its ok. I found the solution on the YOUTUBE.
https://www.youtube.com/watch?v=OjcqxtYFsgE
GOOD LUCK.Leave a comment:
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Re: Faulty 42LG3000 Help!
took TWO YEARS for danjcar1's response.
Last edited by nomoresonys; 02-15-2015, 12:42 PM.Leave a comment:
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Re: Faulty 42LG3000 Help!
hye, i have the same problem: i can't find the fault on tv wich is 42LG3000-ZA.AEU. When i try to power-up the image is white bu the sound is fine. After 1-2 or many hours the image appear on the screen. I replace the t-con module but is the same. Some people sad the panel is broken.
Any ideeas?
Thanks in advance...............Leave a comment:
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Re: Faulty 42LG3000 Help!
I found a faulty ceramic capacitor on the one of the boards that the ccfls are connected too. It had burnt out completely and was visibly damaged. Replacing it brought the set back to life.Leave a comment:
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Re: Faulty 42LG3000 Help!
I'm dealing with the same issue, right now. Could you let me know how you fixed yours?Leave a comment:
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Re: Faulty 42LG3000 Help!
I was not sure where to post this so I did it twice.Leave a comment:
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Re: Faulty 42LG3000 Help!
You can tell by looking at them. You will see burn spots on the inside of the bulb (ccfl)Leave a comment:
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Re: Faulty 42LG3000 Help!
You be good if this is correct fix, how do i test the ccfl's.Leave a comment:
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Re: Faulty 42LG3000 Help!
Faulty ccfls inside this panel are very common causing problems with the inverters.
Posting the fix is why we are here. I have repaired several of these panels and it would be nice to know what you found that I have not seen yet.
Also that should be a 42lg30-ua using an au-optronics panel.
The 42lg30 uses the better panel and better inverter.Last edited by cadiman; 09-14-2012, 08:50 PM.Leave a comment:
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Re: Faulty 42LG3000 Help!
I managed to find the fault and fix it if anyone is interestedLeave a comment:
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Re: Faulty 42LG3000 Help!
Yeah I did have a read through it. So hopefully I can fix it and post how I did it. Must admit that this forum is very helpfull.
DanLeave a comment:
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Re: Faulty 42LG3000 Help!
I dont know if you have read the thread but we have struggled with this set before.
Eventually had to measure all pins but never bottomed out what the problem was or heard if it got fixed or not. If you look at the last post it says which pins on the inverter transformers gave a reading.
https://www.badcaps.net/forum/showth...light=42lg3000Last edited by selldoor; 07-19-2012, 09:09 AM.Leave a comment:
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Re: Faulty 42LG3000 Help!
Ok thanks will try that then report back.Leave a comment:
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Re: Faulty 42LG3000 Help!
I did try different ones. What is the best way to generate a flat white image?
Then I will try that.
Thanks DanLeave a comment:
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Re: Faulty 42LG3000 Help!
Which of the two pins on each side were you probing... did you try different ones?
Can you plug your TV into a computer and generate a flat white image, then use this to see if any dim bar appears on the screen? If it does this could indicate a bad bulb.Leave a comment:
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Hello everyone. 😀
As per thread title, this unit has a serious SMPSU fault. It blows F1001, which is a 10A M205 in the phase from the mains input.
Very first thing I tried, was simply replacing the fuse, but the replacement ceramic fuse blew immediately.
Looking at the schematic for this PSU, I then removed what I thought was the next likely candidate: D1001 - the HV main bridge rectifier.
This isolated the fault(no longer blows the main fuse), but does not point me to the actual fault.
There are no devices that have exploded or otherwise show signs... -
I have this LG 42LG3000 Tv which operates on all inputs without any issues whatsoever. However when you try to turn the Tv off the screen goes blank as it would normally however it then turns itself back on again!
So far I have replaced the main board without any resolution to the problem.
When the inverters master and slave VIT71053.54 VIT71053.55 are disconnected from the power supply then the TV will turn off as it should (obviously without any ccfl output).
I have read through a few posts for this model without anyone having this issue as far as I can tell.
I... -
- Prior owner tried a replacement main board. No difference.
- Samsung 2x red blinking standby LED = panel fault
- Jumpered FB_TRDY_1 (pin 1 CN1300 left. main tcon->left side buffer boards) and FB_TRDY_3 (pin 95 CN1301 right. main tcon->right side buffer boards) This allows testing individual T-Con (on main board) connection to panel on this Samsung. Found fault on left side (viewing from rear of TV)
- Each side has 2 buffer boards, disconnected left side flex between 2 buffer boards. Fault is on the left most board.
- Tape masking eventually isolated to CN1300 pin 15 (CKV4_GOA) Display
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I am a hobbyist (not a professional) so please be gentle...
I recently received an XR-77A80J that wouldn't turn on. (Repeating 5 flashes when plugged in.)
I did a hard reset by holding the power button for about 30 seconds until the set powered down. I then tried to turn it on and it powered up, bringing me to the setup screen. There's not a lot of detail on the setup screen but the picture didn't have any distortions, so at least a cursory examination suggests no physical damage to the screen. The set appeared to be working normally, but it shut down after about 15 seconds,... -
I have been having a fun time at work with two pieces of equipment that had shorted components or shorted component cables to machine frame
I would check what my multi meter was telling me about how many ohms I getting with the multi meter was telling versus the ESR was telling me about weather or not it really was a short to machine ground or not
One note at first we thought that it might be a bad I/O card or a malfunction PLC including me as well but I thought I would try and see if removing the I/O cables would make a difference or not and this time it did make a difference...
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