Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Okay here are two pictures of the t-con board. I couldn't make my mind up which one is a better picture....
CloakedWarrior
Member
Last Activity: 12-08-2018, 11:22 AM
Joined: 11-28-2018
Location: Tennessee
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Any idea what voltage range i'd be looking for? Can't seem to find much material on testing main boards and t-cons....Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
I'd like to test the connectors being that I have 2 t-cons and the same result from them both but in order to do that I'd have to find out what the required voltage from the main board is supposed to be to make sure I have the required amount to the t-con.Leave a 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?Leave a 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...Leave a comment:
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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.Leave a 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.
[url]https://youtu.be/61u_ITd4U4E[/url]Re: LG42CS570 Screen Acts Like It Ne..._ITd4U4E[/url]Leave a comment:
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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.Leave a comment:
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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...Last edited by CloakedWarrior; 12-06-2018, 02:39 PM.Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
I noticed that while the Tv is on if I tap on the top of the screen where the I'm guessing the PCB or LCD driver boards are the screen seems to change and correct itself a bit but not until there is a significant amount of heat surrounding the boards with the case on. Ribbons are clean. I clean both there end and t-con end when I installed the new t-con board.Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
The T-con did match just the same exact issues. Not sure about a weak capacitor but I did replace 2 capacitors on the power board that seemed to have a slight bulge to me but upon checking them they were good.Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Do I feel around the frame at power up or after being on for sometime?...Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Update : I have replaced the t-con board with no resolve to the issue.Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Going to give the T-Con board a try. Any possibility that it could be the solder joints on the main board? I've seen videos of individuals putting the main board in a 385 degree oven for 10 minutes or so to re do the joints because of the processor solder becoming cracked underneath.Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Update I left the TV off for 2 days and the symptoms are now different. When the Tv is powered on Cold it will display the LG start up logo as normal full screen; after start up the top of the screen will display 1 inch of source picture full screen horizontally; the bottom portion of the screen will be cloudy gray vertical lines; sound is normal no other issues. After start up and approx. 40 to 45 mins of running source the screen will slowly grow from 1 inch to 3 inches and so on and so forth until it reaches about mid ways of...Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Update: I cleaned the ribbons to the drivers both on T-Con side and driver side. I also cleaned the connector to the main board and T-Con board. The behavior did not change.Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Okay thank you for your advice I will give this a try and follow up asap.Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Any specific ones? Or just in general?Leave a comment:
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Re: LG42CS570 Screen Acts Like It Needs To Warm Up
Just a follow up the TV has been off for 2 days and I powered it on this morning and to start off the LG logo screen will appear upon start up (full screen) after a brief second it will slowly fade away. After initial start up the top 1 inch of the screen will start showing normal picture. I have let it run for 30 minutes now and the picture seems to be growing from 1 inch making its way to the bottom of the screen. Any suggestions or help would be greatly appreciated.Leave a comment:
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LG42CS570 Screen Acts Like It Needs To Warm Up
My Tv was manufactured in 2012 it is an LG 42' LCD Tv Model# 42CS570-UD.
The Problem I seem to be having is when the Tv is powered on after being off for a period of time the screen freezes and glitches for about 30 to 45 minutes before returning to normal operations. The problem has since been replicated by the air around the Tv being cooler than the operating temperature of the Tv it will cause issues until the air is warmed around the Tv. I have powered on the Tv with only the right ribbon being unplugged from the T-con board with the screen only remaining black. Again with only...
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