Here we have a non functional LG L226WTQ-BF flat panel monitor that has a flashing power button light and no picture
First you need to remove the power cable, signal cable and the stand. Next remove the screws holding the back of the case on.
Now after the screws are removed you will need to use the flat blade screwdriver to separate the 2 case halves. Insert the screwdriver between the plastic case halves and gently pry the 2 apart. The case has plastic latches around the outside that will release as you pry.
Remove the LCD panel from the case and set them to the side.
You will need to remove the metal shield from the backlight plugs as shown in the picture
Next you will need to unplug the 4 backlight power plugs as seen circled in yellow to the right. When re-assembling the monitor you can plug the plugs back into any the the sockets, there is not any polarity or voltage differences
Gently lift up the metal shield as shown to the right. The board we need to get to is the one on the left.
Remove the 4 screws as circled below and remove the board from the shield. The 5 capacitors that need to be replaced are circled in the picture
The part numbers on the board are as follows: C300, C203 and C206 are 1000uf 25volt and C208 and C209 are 1000uf 16volt. Be sure to install the new ones with the polarity stripe on the side going the same direction as the old ones come out.
After the parts are replaced just reverse the procedure to reassemble the case. Now apply power and you should have a fully functional monitor again