I have a Samsung Syncmaster 204B that's displaying garbage on the bottom half of the screen at power-up. After a few seconds, it starts to fade to black -- not uniformly, but spreading out over the course of about five seconds. When the bottom half has all turned black, the backlight goes out for about half a second and then comes on (but still no display on the bottom half). The top half is fine, displaying the "Analog/Digital" no-connection message.
Capacitors on the PSU board have been replaced. I've confirmed that the top board (the one with the LCD flex connectors) is getting a solid 5V throughout. All the flex connectors seem firmly connected.