Question about LG Computers & Internet
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Posted on Jan 02, 2017
open unit, adjust focus pot on flyback, may have 2 focus pots.
do both until satisfied.
If the problem varies with temperature (on time), then you may have a failing flyback.
Posted on Oct 02, 2008
The normal crt monitor have a demo display when you unplug the vga cable to PC like this image below..
If the crt monitor green LED light steady and heater beam have light, the horinzontal and High Voltage supplied to tube is completely good. If you encountered this problem just focus on video section of crt monitor. But before you start... find the flyback transformer behind this they have two controls screen & focus. After you found it plugin the monitor use plastic precision or small screw philip driver for safety to high voltage at horizontal area choose screen control rotate it to clockwise direction follow this....
If the display responses or from dim to lighter 100% you have a problem to ABL find this at the bottom of horinzontal section near at flyback transformer pins trace the line of ABL for dried solder, open resistor if nothing happen find the Video IC at chroma section and replace it. follow this...
For LG & Redfox you found LM1269NA Visit this site for seaching semiconductor matches www.alldatasheet.com Good luck.
Check this site for searching semiconductor
Posted on Aug 25, 2009
SOURCE: LG 700E CRT 17" monitor,
problem with the monitor Display cable. it is damaged.
Normally monitor will receive 3 colors red, green, Blue signals from CPU. If one cable i.e Red wire connection is missing in display cable which is connected to monitor, Red color image on monitor wil be replaced with other fade color.
So, need the replace the display cable or display connector!
Posted on Dec 10, 2010
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