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LG L1900E flickering after cold start

My one year old LG L1900E 19" LCD monitor, after 10 months of perfect working, started to flicker after a cold start.
It flickers all the screen as a stroboscopic light for a couple of minutes after I switch it on, or after coming out of sleep mode. I said "cold" start because this only happens when the monitor has been sleeping or switched off for a while (I didn't measure this "while").
After stop flickering, it works fine. If then I switch it off and on, there's no problem, because it is "warm".
It's not a video card nor drivers problem, because it flickers with my desktop and laptop. Neither an interface problem, because it flickers using the VGA and the DVI conectors.

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  • Sebastian Salgado Dec 29, 2008

    I don't understand you fully. What do you mean with "rendering" and what is the setting I can adjust to correct the problem?

  • Sebastian Salgado Dec 29, 2008

    My previous comment was an answer to mattattack13

  • XIVSander Jan 22, 2009

    Same problem with my LG L1970HR-BF, worked perfectly for about 1 year to 18 months and then sudenly started flickering for about 2-3 minutes ever time the monitor "cold starts".

    This is not a software issie because I have another samsung LCD to the left of the LG that is older but works without flickering allways.

    I noticed if I switch the setting on the monitor to shot more light it flickers less.
    I will probobly solve this issiu by throwing the LG piece of ... out and never buy an LG monitor again.



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This is probably due to a bad solder joint somewhere. Bad solder joints can effect a unit in the reverse also. IE works at first and then dies after it gets warm. Think about how metal expands when it is heated. And contracts as it gets cold. If there is a hairline fracture on one or more component joints, this would cause it to not have such a great or solid connection when it is cool, or contracted. As it gets warmer, the solder expands therefore filling the void and giving it a good connection.

Regardless, it will likely only get worse over time. If you're handy with a soldering iron, pop it open and reflow all the joints. Especially the ones on the transformers and copper coils. Best to hit them all, excluding the tiny surface mount devices.

If you need further help or if you'd like to have this, or any other LCD monitor repaired for a flat rate fee of $40, please visit my web site, or email me at

BOISE LCD - LCD Monitor Repair
Chris McLellen
(208) 891-9117

Posted on Jan 03, 2009

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I had this problem on a flat screen it is the rendering it useally will self adjust but you can set to a certian setting so it wont do it any more

Posted on Dec 29, 2008

  • mattattack13 Jan 02, 2009

    its in the graffics 3D rendering just google it and they will tell u where it is on your machine



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