Monitor turned off and now will not restart (Power light flashing rapidly)
If your LG L204WT will not power up all of a sudden, 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.
You will need to replace:
C105: Electrolytic Cap, 47uF 50V 105 degrees C
C106: Electrolytic Cap, 1uF 50V 105 degrees C
C202,C206: Electrolytic Cap, 680uF 25V 105 degrees C
C203,C204, C205: Electrolytic Cap, 1000uF 25V 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.
Nov 27, 2007 |
LG L204WT LCD Monitor