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How to remove lg crt monitors back cover after removing its two screw and also expain to reset the contrast and brightness setting

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There are front panel controls to adjust contract and brightness.
If you don't have electronics knowledge then I suggest you do not remove the cover to access the electronics because there are dangerous high voltages inside, even though the monitor may be disconnected from the mains supply.

Posted on Aug 19, 2010

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Monitor Reset Problem


Id try a different monitor to start with.

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How to opan lg crt monitor back case


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10_28_2011_9_42_12_am.jpg

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It's time to RESPONSIBLY RECYCLE any 17-inch CRT monitor, and buy a LCD monitor;
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You can try this. Open the cover (Unplug the monitor and leave at least for 30 minutes before doing this). See whether dust is there. If there is dust, get a 1" paint brush and gently remove the dust with the brush. Always sweep the dust away from the unit. If black dust is present around certain cables and around the flyback transformer (that black box covered with aluminium plates), use a soft cloth to wipe them (do not wet the cloth). *Make sure you dont turn those rings on the back of the tube while wiping the the dust. After cleaning the dust, replace the cover, connect it to the PC and check. You will have a brighter picture!

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Oct 26, 2008 | LG Studioworks 700S 17" CRT Monitor

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I fixed it myself, it seems that the monitor have some problems remembering it's settings and sometimes it automatically set its settings to crazy values that are out of the range that we are allowed to input. For my case, the setting that was crazy was the gamma setting since it was set so high. I wasn't able to bring it back to a normal setting so I found a way to do it by resetting the monitor. So to reset these display settings such as colour, contrast, brightness and gama, you need to turn on the monitor and unplug the monitor without turning it off and plug it back in again. It will automatically power on and the correct default settings will be present.

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1 Answer

Dark image


Flyback transformers usually have 2 adjustable rods - 1 is for focus the other is for screen (G2) voltage. try turning Clockwise the Screen adjust with brightness-contrast at max. Till you see white diagonal lines, then go back until the lines disappear - then tune the brightness to your desired level.

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LG Studioworks 700E


seems flyback problem ,leave it to the repairman...

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