Question about LG Studioworks 700S 17" CRT Monitor

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Monitor LED blinking--no display--How to open the cabinet

Monitor have to opened but i m failure

Posted by dinesh_chavh on

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Anonymous

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Check the vga cable if it is attached properly to your computer. Make sure that the VGA cable is connected to the Video Card that you are using.

check in the manual if you need to install the driver first.

also check if the monitor will work to another computer. If not, Then you can check the VGA Cable and replace a new one.

Hope this will help you out .. =)

Posted on Aug 24, 2009

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Hi

1. First suspect the vga cable use another new one. If your vga is
fix to crt monitor open it use analog multimeter range
x1 or x10 for checking continuity.Test the unit before you
proceed to next step.

2. Unplug the VGA card use eraser to clean this;
Monitor LED blinking--no display--How to open the  - a08207d.jpg
clean vga slot use laquer tainer and toothbrush. if nothing happen
3. Direct your vga cable to motherboard make sure you have built-
in video card. if nothing happen again
4. suspect you have a problem to your monitor. open this
troubleshoot the video section.Plugin and show the heater beam
must have lights if not, desolder the crt socket clean it carefully
& trace the line supplied to heater find open resistor if you have
knowledge for voltage testing much better. Voltage test
the heater pins start at flyback pins to heater crt pins. If you
have no voltage found, find the b+, connect black prove to hot
ground of horizontal area check the voltage use analog tester
range 250v DC i think the normal is 100v - 175 v check the
horizontal output transistor for shorted.

Note:
If you replace new horizontal output transistor recheck it
again if the H.O.T shorted again repalce your flyback
transformer.


Gud luck....



Posted on Aug 25, 2009

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freetek

Steve Allison

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SOURCE: Monitor LED blinking--no display--How to open the cabinet

Most monitors (among the ~2000 I have repaired) have either four screws at the extreme corners accessible from the rear or only two with the other opposing edge snapped in. Some monitors, will have and extra 1 or 2 screws around the area where the connections are made while others may have only snap-in molded tabs that must be released with a flat-blade screwdriver.
Before bothering the monitor, I recommend you substitute another monitor to ensure that the monitor is receiving the signal inputs it needs to function. Loose connectors and failed video sections can also be the cause as well as a 'lost' driver that Windows has corrupted.
I also suggest you leave the monitor unplugged from the AC ine overnight since there are components that can retain hundreds of volts of charge for hours and deliver as really unpleasant shock if you tangle with one of these points. If the high voltage (horizontal) section is still active, it can deliver around 25,000 volts with enough power to punch a hole through your thumb.
A primitive check for the operation of the high voltage is to hold an AM band radio at various points of the housing. If you get squeals, the horizontal section is at work.

Posted on Jul 15, 2009

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Most monitors (among the ~2000 I have repaired) have either four screws at the extreme corners accessible from the rear or only two with the other opposing edge snapped in. Some monitors, will have and extra 1 or 2 screws around the area where the connections are made while others may have only snap-in molded tabs that must be released with a flat-blade screwdriver.
Before bothering the monitor, I recommend you substitute another monitor to ensure that the monitor is receiving the signal inputs it needs to function. Loose connectors and failed video sections can also be the cause as well as a 'lost' driver that Windows has corrupted.
I also suggest you leave the monitor unplugged from the AC ine overnight since there are components that can retain hundreds of volts of charge for hours and deliver as really unpleasant shock if you tangle with one of these points. If the high voltage (horizontal) section is still active, it can deliver around 25,000 volts with enough power to punch a hole through your thumb.
A primitive check for the operation of the high voltage is to hold an AM band radio at various points of the housing. If you get squeals, the horizontal section is at work.

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