Question about LG DU-37LZ30 37 in. LCD HDTV

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Black streaks behind the glass

I am not sure of the model number, but it is a LG 37 inch HDTV-LCD. The tv has a few black streaks, going in several directions, behind the glass. Other than that the picture quality is fine.from what I can see. The tv is always turned off, anytime that I cleaned the screen, so there were never any moisture problems. It is very distracting to watch any tv, because of the streaks. The streaks appear on any channel and from outside sources, so I know that is not caused by the cable provider, Any help in resolving the problem would be greatly appreciated.
My email address is derekcus@yahoo.com

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  • petulantfem Nov 18, 2008

    Two black streaks just appeared on our 57" Panasonic PT-56TW53 HDTV Projection Monitor TV. They weren't there last night. This TV was made in 2003, so it is about 5 years old - but other than this it has no problems. It was just given to us by a friend who was upgrading and just before we turned it on and noticed the streaks, we had wiped it with a cloth and windex (the previous owner was a smoker). The black streaks are behind the glass. Could the windex have caused the problem?? Can it be repaired? Any input would be appreciated.

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.

Posted on Apr 08, 2017

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SOURCE: 42 inch LG Plasma TV - Lost picture

ysus pcb that supplies voltage to the panel is faulty

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Cheers mate, is there anywhere you cold think of that would be able to deal with these kind of problems at all?

Posted on Feb 20, 2008

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try connecting tv to cable direct also try unplugging both converter and tv for wile like 5 mins plug both back in see if tv and converter sync

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SOURCE: 42 inch LG Plasma TV - Lost picture

Hi , I recently had the same problem which I was determined to fix . So I did a few weeks of research to find that it was the Y SUS board which burns out. I'm sure you realized that the TV gets hot. Personally I think this is why. circuit boards don't like heat and I've learned that the cooling fans are a joke. I replaced the board and got my picture back. I proved the fan theory because after the screen started to act up. I placed a cooling fan near the vent holes on top and the problem cleared right up,It also helps if you lower the brightness which helps out on the heat situation.I will soon be adding a fan with a temp. sensor. This shoud help if your screen has lines when you initially turn the cool TV on.then I have Some other costless solutions. Hope this helped these are great TV's and like our cars we maintain them not throw them away..................................Mr Wiseman

Posted on Jan 30, 2009

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SOURCE: frozen picture on LG LCD 37"

Try One of your working TVS and connect it to your cable outlet of the TV that is having problems. If that TV Does not work then there may be a degraded fitting or the Leg coming of the splitter to that outlet could have a Low Signal Problem
Next Take the First TV that was not working properly and put it on the cable outlet of one of the TVs that is working properly and if the TV set works on that Channel then you know it is not your TV that it must be the cable

Posted on Feb 28, 2009

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