Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Example, different brand but same general idea. https://www.youtube.com/watch?v=vCExlSnG4yY
Example, different brand but same general idea. https://www.youtube.com/watch?v=vCExlSnG4yY
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Also have seen this symptom where the backlights were the problem, could be bad or loose connection too, tapping tv changes picture that is.Last edited by nomoresonys; 12-06-2018, 06:28 AM.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Looks like you only have to get to the scandrive boards, this is an lg, isn't your exact model. then apply a little pressure to tabs to see which one it is. https://www.youtube.com/watch?v=s4wNc3hF4JIComment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Thank you for your time you have put in to trying to help me. I tore it down all the way to the tabs cannot seem to find an exact fault in one particularly so I put a piece of black electric tape over the humps built into the frame over the TABS thinking maybe they were getting to cold because of possibly resting on the metal frame??? Idk i'm so confused at this point lol.
Most of the issues I have seen are lines and problems that are vertical. My screen is in half horizontally. It has a full picture from one end to the other across the top only about 1 inch wide to start, then as time passes it will go from 1 to 3 inches and just before it reaches the half way point it starts glitching the entire bottom of the screen as if something is warming up and starting to work properly as it starts the glitching I can start tapping on the top of the Tv and sometimes it effects it and sometimes not.Last edited by CloakedWarrior; 12-06-2018, 02:39 PM.
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Update : No type of shimming seems to work. I watched a few videos on others doing the same thing but no luck and cannot seem to get any effect out of even messing with the boards or drivers.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Maybe test the voltage regulators on the mainboard, I might be tempted to try and find a decent priced mainboard.Last edited by nomoresonys; 12-07-2018, 06:43 AM.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Ran across this while searching google, don't know anything about them tho, was cheapest by far, could also be a dud, who knows. https://www.shoppinder.com/trends/cs-570Last edited by nomoresonys; 12-07-2018, 08:48 AM.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
I made a video of the symptoms from start to finish if you'd care to check it out.
https://youtu.be/61u_ITd4U4EComment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
I might try the main board. I tried the baking method with no results.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Dam if that don't still look like a tcon issue?Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Wonder if your lvds/tcon cable could be faulty?Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Thought I saw some utube videos that showed how to determine if it was a mainboard or panel issue.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
According to this site, theres like 10 substitute parts that will also work, did some searching, still seemed hard to locate one for a decent price. https://tvpartsforsale.com/product/l...04-main-board/Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
How about trying to heat up different boards (or parts of the boards) with a hair dryer to see if you can narrow down or confirm the bad part / board?
If you heat a section up, power it on and it works right away - bingo!Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
I have tried heating up different boards with no success to affect it in anyway other than right about the 30 minute mark of it warming up I can tap on the top of the frame mainly the corners and it will jolt and seem like it effects the picture to some degree.
I checked the voltage from the power board pins going to the main board and all seemed to be within range of the schematic on the board. I preformed the check at first on and when operating properly to see if there was a change I noticed nothing which leads me to presume the power board has no fault.
I am not certain as how to check the main board or tcon properly. Any tips would be lovely lol.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
How would I find out how much voltage is supposed to be going through the lines from the main board to the t-con? And the voltage from t-con to tab driver boards?Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
I'd test the tcon, not sure what voltages you should get but it would be nice to eliminate it from the suspects.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
You have 2 tcons, you could see if you get the same voltages on both.Comment
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Video @3:13 looks like bad panel issue.
You need to test Voltages on the T-CON board test points, I.E. VGH, VGL, VDD, etc.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!
My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.
This time the original cable broke too close to the screen, it can't be fixed without tearing the screen... -
Hi,
I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on... -
A) TV initially dead
B) On a hunch of a locked up Google OS, plugged in a USB memory stick with latest FW and plugged it in. It booted into the update screen, completed the update and restarted to Home screen.
C) Was able to perform a Reset from Settings menu and completed out of box configuration.
D) Ran a 4K screen saver demo for about 6 hours, then turned it off for the day. Did not notice any stripes, dead zones or other artifacts in the image.
E) Powered back on and it now runs for a few minutes before relay clicks, screen goes blank, Main Board Red Digital Optical... -
Hello everyone, I’ve just been given a Samsung UE55JU6800K smart tv as it had white spots on the screen due to the led lenses falling off. After refitting them & putting the tv back together I thought it was a nice easy fix for a free bedroom tv , then I tried it before screwing the back into place. I realised that the right side of the screen was darker than the other side, I removed the screen again as I thought the backlights had failed but they are fine.
I put the screen back in place & turned it back on . The screen seemed to be ok again but different screens on the same... -
I'm currently trying to diagnose and fix my Vizio TV (Model M50-C1). I've tried a number of different basic solutions, but I'm trying to determine if my issue is currently a failing panel, T-Con board, or main board (or something else entirely) and whether or not it is worth my time to fix it. Details of the issue and what I've tried are below as well as why I think it is either a bad panel, T-Con board, or main board.
The Issue: The TV will be on and working fine but after the TV is on for ~5-10 minutes the screen will freeze (with sound continuing) until the TV reboots itself. While...
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