Question about LG L204WT LCD Monitor

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How do I get into the LG 204WT monitor to change the capacitors in the power supply?

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Here are the service manuals: http://elektrotanya.com/?q=showresult&megnev=LG%20&megnev2=L204WT%20&kategoria=&kat2=all

Start separating the case at the bottom edge of the monitor then work your way around using thin flat blade screw driver, be careful with any cable attached to the front bezel.

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Posted on Aug 29, 2010

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The monitor has 4 screws at the rear which you need to remove. Then the front bezel clips off.

If your LG L204WT will not start up - only shows the blue LED but no display, or takes long to power up, or dies after a while and it has not been exposed to lightning damage then in all likelihood the Electrolytic capacitors in its power supply has started to fail.
Unplug the unit from mains. To open it up, remove the 4 philips screws at the back. Then starting at the bottom corner use a small flat screw driver to wedge the front bezel loose. After removing the bezel the rear casing will also come off the panel. The circuitry case is taped to the panel with silver tape. Loosen the tape, lift the power supply. Carefully unplug the two sets of backlight cables, and the front panel controls to completely remove the circuitry case. Now remove the 4 screws holding the power board and then replace the following capacitors:
You can order caps from most electronic component stores. All the capacitors should cost under US$10.
You will need to replace:
C105: Electrolytic Cap, 47uF 50V 105 degrees C
C106: Electrolytic Cap, 1uF 50V 105 degrees C - very important, this one usually does not swell up.
C202,C206: Electrolytic Cap, 680uF 25V 105 degrees C
C203,C204, C205: Electrolytic Cap, 1000uF 25V 105 degrees C
C339 - 33uF 50V - I replace with 47uF 50V 105 degrees C.
You can always use a HIGHER voltage and a slightly HIGHER uF, and HIGHER temp rating but never lower.
Make 100% sure to observe the polarity when replacing the caps. Electrolytic caps have a clear negative marking stripe on the side coinciding with a black mark on the board.
If, after a few months of fixing it it fails again chances are your C106 and C339 has failed again - use a better quality capacitor with a higher voltage and temperature rating.

Posted on Jun 02, 2014

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