Question about LG L196WTQ-BF 19" Monitor
Are you sure that the lamps (4) are bad and not the backlight inverter circuits.
Service manual: http://elektrotanya.com/?q=showresult&megnev=LG%20&megnev2=%20L196WTQ-BF%20&kategoria=monitor&kat2=schematics
Not all the LCD lamps can easily be removed, some of them you have the completely disassemble the screen to get the lamp asemblies out. Need to do voltage checking and caps inspection first, it should have 5vdc for the logic and 16~18vdc for the inverter circuits
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
Posted on Jul 09, 2010
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Posted on Jan 02, 2017
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