Samsung Syncmaster 214T repair for the symptom of a faint and flashing picture.
The solution is to replace 5 capacitors in the power supply. They are 3 x 330 uf at 25 volts and 2 x 820 uf at 25 volts. It is safe to use 470 uf and 1000 uf capacitors to replace them if you do not have the correct values in stock.
Dis-assembly can be a little tricky. Start by removing the base by removing the 4 screws on the back of the monitor. Then there are catches all around to remove the front. Start at the bottom, and watch out for the short cable to the front controls. Once the front bezel is removed, the guts come right out. Then remove the metal cover and there is the power supply.
There are 5 capacitors that are bulging as can be seen in the picture below, replace them.